core.html.en revision c2451eae557a622ee4bfa77c6e359abd29c25283
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd This file is generated from xml source: DO NOT EDIT
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd<link href="/style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd<link href="/style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd<link href="/style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd<link href="/images/favicon.ico" rel="shortcut icon" /></head>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<p class="menu"><a href="/mod/">Modules</a> | <a href="/mod/directives.html">Directives</a> | <a href="/faq/">FAQ</a> | <a href="/glossary.html">Glossary</a> | <a href="/sitemap.html">Sitemap</a></p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div class="up"><a href="./"><img title="<-" alt="<-" src="/images/left.gif" /></a></div>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.3</a> > <a href="./">Modules</a></div>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<p><span>Available Languages: </span><a href="/de/mod/core.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="/en/mod/core.html" title="English"> en </a> |
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="/es/mod/core.html" hreflang="es" rel="alternate" title="Espa�ol"> es </a> |
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="/fr/mod/core.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a> |
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="/ja/mod/core.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<a href="/tr/mod/core.html" hreflang="tr" rel="alternate" title="T�rk�e"> tr </a></p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Core Apache HTTP Server features that are always
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Core</td></tr></table>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div id="quickview"><h3 class="directives">Directives</h3>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#acceptfilter">AcceptFilter</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#acceptpathinfo">AcceptPathInfo</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#accessfilename">AccessFileName</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#adddefaultcharset">AddDefaultCharset</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#allowencodedslashes">AllowEncodedSlashes</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#allowoverride">AllowOverride</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#cgimapextension">CGIMapExtension</a></li>
f888346b48f5e5b5e3f0a47dedb8cefd2759a4e2gregames<li><img alt="" src="/images/down.gif" /> <a href="#contentdigest">ContentDigest</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#defaulttype">DefaultType</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#define">Define</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#directory"><Directory></a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#directorymatch"><DirectoryMatch></a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#documentroot">DocumentRoot</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#enablemmap">EnableMMAP</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#enablesendfile">EnableSendfile</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#error">Error</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#errordocument">ErrorDocument</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#errorlog">ErrorLog</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#errorlogformat">ErrorLogFormat</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#extendedstatus">ExtendedStatus</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#fileetag">FileETag</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#files"><Files></a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#filesmatch"><FilesMatch></a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#forcetype">ForceType</a></li>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<li><img alt="" src="/images/down.gif" /> <a href="#gprofdir">GprofDir</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#hostnamelookups">HostnameLookups</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#if"><If></a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#ifdefine"><IfDefine></a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#ifmodule"><IfModule></a></li>
a2a0abd88b19e042a3eb2a9fa1702c25ad51303dwrowe<li><img alt="" src="/images/down.gif" /> <a href="#include">Include</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#keepalive">KeepAlive</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#keepalivetimeout">KeepAliveTimeout</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#limit"><Limit></a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#limitexcept"><LimitExcept></a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#limitinternalrecursion">LimitInternalRecursion</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#limitrequestbody">LimitRequestBody</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#limitrequestfields">LimitRequestFields</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#limitrequestfieldsize">LimitRequestFieldSize</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#limitrequestline">LimitRequestLine</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#limitxmlrequestbody">LimitXMLRequestBody</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#location"><Location></a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#locationmatch"><LocationMatch></a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#loglevel">LogLevel</a></li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><img alt="" src="/images/down.gif" /> <a href="#maxkeepaliverequests">MaxKeepAliveRequests</a></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><img alt="" src="/images/down.gif" /> <a href="#mutex">Mutex</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#namevirtualhost">NameVirtualHost</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#options">Options</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#protocol">Protocol</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#rlimitcpu">RLimitCPU</a></li>
2d399cd7535887fceaa9f8f116eb98ce68ddd602trawick<li><img alt="" src="/images/down.gif" /> <a href="#rlimitmem">RLimitMEM</a></li>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<li><img alt="" src="/images/down.gif" /> <a href="#rlimitnproc">RLimitNPROC</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#scriptinterpretersource">ScriptInterpreterSource</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#seerequesttail">SeeRequestTail</a></li>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<li><img alt="" src="/images/down.gif" /> <a href="#serveradmin">ServerAdmin</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#serveralias">ServerAlias</a></li>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<li><img alt="" src="/images/down.gif" /> <a href="#servername">ServerName</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#serverpath">ServerPath</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#serverroot">ServerRoot</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#serversignature">ServerSignature</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#servertokens">ServerTokens</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#sethandler">SetHandler</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#setinputfilter">SetInputFilter</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#setoutputfilter">SetOutputFilter</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#timeout">TimeOut</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#traceenable">TraceEnable</a></li>
3e392a5afd51526de3cb15d57ee46d8cb160ae65gregames<li><img alt="" src="/images/down.gif" /> <a href="#undefine">UnDefine</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#usecanonicalname">UseCanonicalName</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></li>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<li><img alt="" src="/images/down.gif" /> <a href="#virtualhost"><VirtualHost></a></li>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<div class="directive-section"><h2><a name="AcceptFilter" id="AcceptFilter">AcceptFilter</a> <a name="acceptfilter" id="acceptfilter">Directive</a></h2>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures optimizations for a Protocol's Listener Sockets</td></tr>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AcceptFilter <var>protocol</var> <var>accept_filter</var></code></td></tr>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
2a6e98ba4ffa30ded5d8831664c5cb2a170a56b6coar<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.1.5 and later.
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar <p>This directive enables operating system specific optimizations for a
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar listening socket by the <code class="directive">Protocol</code>type.
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar The basic premise is for the kernel to not send a socket to the server
2a6e98ba4ffa30ded5d8831664c5cb2a170a56b6coar process until either data is received or an entire HTTP Request is buffered.
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz Only <a href="http://www.freebsd.org/cgi/man.cgi?query=accept_filter&sektion=9">
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz FreeBSD's Accept Filters</a>, Linux's more primitive
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <code>TCP_DEFER_ACCEPT</code>, and Windows' optimized AcceptEx()
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe are currently supported.</p>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <p>Using <code>none</code> for an argument will disable any accept filters
4f9c22c4f27571d54197be9674e1fc0d528192aestriker for that protocol. This is useful for protocols that require a server
4f9c22c4f27571d54197be9674e1fc0d528192aestriker send data first, such as <code>ftp:</code> or <code>nntp</code>:</p>
3e392a5afd51526de3cb15d57ee46d8cb160ae65gregames <div class="example"><p><code>AcceptFilter nntp none</code></p></div>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p>The default protocol names are <code>https</code> for port 443
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe and <code>http</code> for all other ports. To specify another protocol
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe is being used with a listening port, add the <var>protocol</var>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe argument to the <code class="directive"><a href="/mod/mpm_common.html#listen">Listen</a></code>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe directive.</p>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe AcceptFilter http httpready <br />
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe AcceptFilter https dataready
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <p>The <code>httpready</code> accept filter buffers entire HTTP requests at
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe the kernel level. Once an entire request is received, the kernel then
c2cf53a40a9814eb91db2cdf820f97d943f21628coar sends it to the server. See the
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <a href="http://www.freebsd.org/cgi/man.cgi?query=accf_http&sektion=9">
4775dfc34c90fada8c7c4d6a57ed8a3114d55c2dtrawick accf_http(9)</a> man page for more details. Since HTTPS requests are
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe encrypted only the <a href="http://www.freebsd.org/cgi/man.cgi?query=accf_data&sektion=9">
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe AcceptFilter http data <br />
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe AcceptFilter https data
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <p>Linux's <code>TCP_DEFER_ACCEPT</code> does not support buffering http
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe requests. Any value besides <code>none</code> will enable
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <code>TCP_DEFER_ACCEPT</code> on that listener. For more details
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe see the Linux
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <a href="http://homepages.cwi.nl/~aeb/linux/man2html/man7/tcp.7.html">
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe AcceptFilter http data <br />
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe AcceptFilter https data
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <p>Window's mpm_winnt interprets the AcceptFilter to toggle the AcceptEx()
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe API, and does not support http protocol buffering. There are two values
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe which utilize the Windows AcceptEx() API and will recycle network
4f9c22c4f27571d54197be9674e1fc0d528192aestriker sockets between connections. <code>data</code> waits until data has
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe been transmitted as documented above, and the initial data buffer and
4f9c22c4f27571d54197be9674e1fc0d528192aestriker network endpoint addresses are all retrieved from the single AcceptEx()
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe invocation. <code>connect</code> will use the AcceptEx() API, also
4f9c22c4f27571d54197be9674e1fc0d528192aestriker retrieve the network endpoint addresses, but like <code>none</code>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe the <code>connect</code> option does not wait for the initial data
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe transmission.</p>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <p>On Windows, <code>none</code> uses accept() rather than AcceptEx()
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe and will not recycle sockets between connections. This is useful for
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe network adapters with broken driver support, as well as some virtual
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe network providers such as vpn drivers, or spam, virus or spyware
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe filters.</p>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<div class="directive-section"><h2><a name="AcceptPathInfo" id="AcceptPathInfo">AcceptPathInfo</a> <a name="acceptpathinfo" id="acceptpathinfo">Directive</a></h2>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Resources accept trailing pathname information</td></tr>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AcceptPathInfo On|Off|Default</code></td></tr>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AcceptPathInfo Default</code></td></tr>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.0.30 and later</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>This directive controls whether requests that contain trailing
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe pathname information that follows an actual filename (or
08ab23ee4e41ac8587da5a3bb8d4e9c49523b0b8nd non-existent file in an existing directory) will be accepted or
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe rejected. The trailing pathname information can be made
08ab23ee4e41ac8587da5a3bb8d4e9c49523b0b8nd available to scripts in the <code>PATH_INFO</code> environment
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe variable.</p>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <p>For example, assume the location <code>/test/</code> points to
c2cf53a40a9814eb91db2cdf820f97d943f21628coar a directory that contains only the single file
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz <code>/test/nothere.html/more</code> both collect
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz <code>/more</code> as <code>PATH_INFO</code>.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>The three possible arguments for the
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <code class="directive">AcceptPathInfo</code> directive are:</p>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <dt><code>Off</code></dt><dd>A request will only be accepted if it
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz maps to a literal path that exists. Therefore a request with
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz trailing pathname information after the true filename such as
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz <code>/test/here.html/more</code> in the above example will return
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe a 404 NOT FOUND error.</dd>
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <dt><code>On</code></dt><dd>A request will be accepted if a
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe leading path component maps to a file that exists. The above
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe example <code>/test/here.html/more</code> will be accepted if
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <code>/test/here.html</code> maps to a valid file.</dd>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <dt><code>Default</code></dt><dd>The treatment of requests with
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe trailing pathname information is determined by the <a href="/handler.html">handler</a> responsible for the request.
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe The core handler for normal files defaults to rejecting
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz <code>PATH_INFO</code> requests. Handlers that serve scripts, such as <a href="mod_cgi.html">cgi-script</a> and <a href="mod_isapi.html">isapi-handler</a>, generally accept
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe <p>The primary purpose of the <code>AcceptPathInfo</code>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe directive is to allow you to override the handler's choice of
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe accepting or rejecting <code>PATH_INFO</code>. This override is required,
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe for example, when you use a <a href="/filter.html">filter</a>, such
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe as <a href="mod_include.html">INCLUDES</a>, to generate content
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe based on <code>PATH_INFO</code>. The core handler would usually reject
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe the request, so you can use the following configuration to enable
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe such a script:</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker Options +Includes<br />
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe SetOutputFilter INCLUDES<br />
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe AcceptPathInfo On<br />
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe </Files>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<div class="directive-section"><h2><a name="AccessFileName" id="AccessFileName">AccessFileName</a> <a name="accessfilename" id="accessfilename">Directive</a></h2>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name of the distributed configuration file</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AccessFileName <var>filename</var> [<var>filename</var>] ...</code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AccessFileName .htaccess</code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe <p>While processing a request the server looks for
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe the first existing configuration file from this list of names in
a2b181763cb35fd899feb4a436aeadaa80bf91eabrianp every directory of the path to the document, if distributed
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe configuration files are <a href="#allowoverride">enabled for that
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe AccessFileName .acl
a2b181763cb35fd899feb4a436aeadaa80bf91eabrianp <p>before returning the document
a2b181763cb35fd899feb4a436aeadaa80bf91eabrianp <code>/usr/local/web/index.html</code>, the server will read
a2b181763cb35fd899feb4a436aeadaa80bf91eabrianp <code>/usr/local/.acl</code> and <code>/usr/local/web/.acl</code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker for directives, unless they have been disabled with</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <Directory /><br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker AllowOverride None<br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker </Directory>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<li><code class="directive"><a href="#allowoverride">AllowOverride</a></code></li>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<li><a href="/configuring.html">Configuration Files</a></li>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<li><a href="/howto/htaccess.html">.htaccess Files</a></li>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<div class="directive-section"><h2><a name="AddDefaultCharset" id="AddDefaultCharset">AddDefaultCharset</a> <a name="adddefaultcharset" id="adddefaultcharset">Directive</a></h2>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Default charset parameter to be added when a response
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowecontent-type is <code>text/plain</code> or <code>text/html</code></td></tr>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AddDefaultCharset On|Off|<var>charset</var></code></td></tr>
cc9582e53aead2a044077c4a92f3dfc3605590b3wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AddDefaultCharset Off</code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>This directive specifies a default value for the media type
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb charset parameter (the name of a character encoding) to be added
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb to a response if and only if the response's content-type is either
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code>text/plain</code> or <code>text/html</code>. This should override
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb any charset specified in the body of the response via a <code>META</code>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb element, though the exact behavior is often dependent on the user's client
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb configuration. A setting of <code>AddDefaultCharset Off</code>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb disables this functionality. <code>AddDefaultCharset On</code> enables
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb a default charset of <code>iso-8859-1</code>. Any other value is assumed
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb to be the <var>charset</var> to be used, which should be one of the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <a href="http://www.iana.org/assignments/character-sets">IANA registered
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe charset values</a> for use in Internet media types (MIME types).
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe For example:</p>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe AddDefaultCharset utf-8
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe <p><code class="directive">AddDefaultCharset</code> should only be used when all
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe of the text resources to which it applies are known to be in that
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe character encoding and it is too inconvenient to label their charset
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe individually. One such example is to add the charset parameter
4f9c22c4f27571d54197be9674e1fc0d528192aestriker to resources containing generated content, such as legacy CGI
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe scripts, that might be vulnerable to cross-site scripting attacks
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe due to user-provided data being included in the output. Note, however,
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe that a better solution is to just fix (or delete) those scripts, since
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe setting a default charset does not protect users that have enabled
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe the "auto-detect character encoding" feature on their browser.</p>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<li><code class="directive"><a href="/mod/mod_mime.html#addcharset">AddCharset</a></code></li>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz<div class="directive-section"><h2><a name="AllowEncodedSlashes" id="AllowEncodedSlashes">AllowEncodedSlashes</a> <a name="allowencodedslashes" id="allowencodedslashes">Directive</a></h2>
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines whether encoded path separators in URLs are allowed to
659ad814f714e556bdd03e1d771cba156baab92ewrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AllowEncodedSlashes On|Off</code></td></tr>
659ad814f714e556bdd03e1d771cba156baab92ewrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AllowEncodedSlashes Off</code></td></tr>
659ad814f714e556bdd03e1d771cba156baab92ewrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
11fb2f3611e6ff9a541e10b13e3108934f828141gregames<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.0.46 and later</td></tr>
11fb2f3611e6ff9a541e10b13e3108934f828141gregames <p>The <code class="directive">AllowEncodedSlashes</code> directive allows URLs
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz which contain encoded path separators (<code>%2F</code> for <code>/</code>
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz and additionally <code>%5C</code> for <code>\</code> on according systems)
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz to be used. Normally such URLs are refused with a 404 (Not found) error.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>Turning <code class="directive">AllowEncodedSlashes</code> <code>On</code> is
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe mostly useful when used in conjunction with <code>PATH_INFO</code>.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>Allowing encoded slashes does <em>not</em> imply <em>decoding</em>.
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe Occurrences of <code>%2F</code> or <code>%5C</code> (<em>only</em> on
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe according systems) will be left as such in the otherwise decoded URL
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe string.</p>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<li><code class="directive"><a href="#acceptpathinfo">AcceptPathInfo</a></code></li>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<div class="directive-section"><h2><a name="AllowOverride" id="AllowOverride">AllowOverride</a> <a name="allowoverride" id="allowoverride">Directive</a></h2>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Types of directives that are allowed in
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AllowOverride All|None|<var>directive-type</var>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AllowOverride None (2.3.9 and later), AllowOverride All (2.3.8 and earlier)</code></td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz <p>When the server finds an <code>.htaccess</code> file (as
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz specified by <code class="directive"><a href="#accessfilename">AccessFileName</a></code>)
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz it needs to know which directives declared in that file can override
7c301a1818939f85da8f3629cc3e9b5588610ef0jerenkrantz earlier configuration directives.</p>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe <div class="note"><h3>Only available in <Directory> sections</h3>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe <code class="directive">AllowOverride</code> is valid only in
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code class="directive"><a href="#directory"><Directory></a></code>
8aefbd756763807188d2e3ce336a8680e4893066wrowe sections specified without regular expressions, not in <code class="directive"><a href="#location"><Location></a></code>, <code class="directive"><a href="#directorymatch"><DirectoryMatch></a></code> or
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="#files"><Files></a></code> sections.
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>When this directive is set to <code>None</code>, then
700b96db75e7cfadb5219978c1735b710d583763wrowe <a href="#accessfilename">.htaccess</a> files are completely ignored.
700b96db75e7cfadb5219978c1735b710d583763wrowe In this case, the server will not even attempt to read
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>When this directive is set to <code>All</code>, then any
700b96db75e7cfadb5219978c1735b710d583763wrowe directive which has the .htaccess <a href="directive-dict.html#Context">Context</a> is allowed in
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>The <var>directive-type</var> can be one of the following
700b96db75e7cfadb5219978c1735b710d583763wrowe groupings of directives.</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe Allow use of the authorization directives (<code class="directive"><a href="/mod/mod_authn_dbm.html#authdbmgroupfile">AuthDBMGroupFile</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_authn_dbm.html#authdbmuserfile">AuthDBMUserFile</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_authn_core.html#authname">AuthName</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_authn_core.html#authtype">AuthType</a></code>, <code class="directive"><a href="/mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code>, <code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code>, <em>etc.</em>).</dd>
700b96db75e7cfadb5219978c1735b710d583763wrowe Allow use of the directives controlling document types
700b96db75e7cfadb5219978c1735b710d583763wrowe (<code class="directive"><a href="#errordocument">ErrorDocument</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="#forcetype">ForceType</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_negotiation.html#languagepriority">LanguagePriority</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="#sethandler">SetHandler</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="#setinputfilter">SetInputFilter</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="#setoutputfilter">SetOutputFilter</a></code>, and
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="module"><a href="/mod/mod_mime.html">mod_mime</a></code> Add* and Remove* directives),
700b96db75e7cfadb5219978c1735b710d583763wrowe document meta data (<code class="directive"><a href="/mod/mod_headers.html#header">Header</a></code>, <code class="directive"><a href="/mod/mod_headers.html#requestheader">RequestHeader</a></code>, <code class="directive"><a href="/mod/mod_setenvif.html#setenvif">SetEnvIf</a></code>, <code class="directive"><a href="/mod/mod_setenvif.html#setenvifnocase">SetEnvIfNoCase</a></code>, <code class="directive"><a href="/mod/mod_setenvif.html#browsermatch">BrowserMatch</a></code>, <code class="directive"><a href="/mod/mod_usertrack.html#cookieexpires">CookieExpires</a></code>, <code class="directive"><a href="/mod/mod_usertrack.html#cookiedomain">CookieDomain</a></code>, <code class="directive"><a href="/mod/mod_usertrack.html#cookiestyle">CookieStyle</a></code>, <code class="directive"><a href="/mod/mod_usertrack.html#cookietracking">CookieTracking</a></code>, <code class="directive"><a href="/mod/mod_usertrack.html#cookiename">CookieName</a></code>),
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="module"><a href="/mod/mod_rewrite.html">mod_rewrite</a></code> directives <code class="directive"><a href="/mod/mod_rewrite.html#rewriteengine">RewriteEngine</a></code>, <code class="directive"><a href="/mod/mod_rewrite.html#rewriteoptions">RewriteOptions</a></code>, <code class="directive"><a href="/mod/mod_rewrite.html#rewritebase">RewriteBase</a></code>, <code class="directive"><a href="/mod/mod_rewrite.html#rewritecond">RewriteCond</a></code>, <code class="directive"><a href="/mod/mod_rewrite.html#rewriterule">RewriteRule</a></code>) and
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_actions.html#action">Action</a></code> from
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="module"><a href="/mod/mod_actions.html">mod_actions</a></code>.
700b96db75e7cfadb5219978c1735b710d583763wrowe Allow use of the directives controlling directory indexing
700b96db75e7cfadb5219978c1735b710d583763wrowe (<code class="directive"><a href="/mod/mod_autoindex.html#adddescription">AddDescription</a></code>,
700b96db75e7cfadb5219978c1735b710d583763wrowe <code class="directive"><a href="/mod/mod_autoindex.html#addicon">AddIcon</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#addiconbyencoding">AddIconByEncoding</a></code>,
8aefbd756763807188d2e3ce336a8680e4893066wrowe <code class="directive"><a href="/mod/mod_autoindex.html#addiconbytype">AddIconByType</a></code>,
8aefbd756763807188d2e3ce336a8680e4893066wrowe <code class="directive"><a href="/mod/mod_autoindex.html#defaulticon">DefaultIcon</a></code>, <code class="directive"><a href="/mod/mod_dir.html#directoryindex">DirectoryIndex</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#fancyindexing">FancyIndexing</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#headername">HeaderName</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#indexignore">IndexIgnore</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#indexoptions">IndexOptions</a></code>, <code class="directive"><a href="/mod/mod_autoindex.html#readmename">ReadmeName</a></code>,
8aefbd756763807188d2e3ce336a8680e4893066wrowe Allow use of the directives controlling host access (<code class="directive"><a href="/mod/mod_authz_host.html#allow">Allow</a></code>, <code class="directive"><a href="/mod/mod_authz_host.html#deny">Deny</a></code> and <code class="directive"><a href="/mod/mod_authz_host.html#order">Order</a></code>).</dd>
8aefbd756763807188d2e3ce336a8680e4893066wrowe Allow use of the directives controlling specific directory
8aefbd756763807188d2e3ce336a8680e4893066wrowe features (<code class="directive"><a href="#options">Options</a></code> and
8aefbd756763807188d2e3ce336a8680e4893066wrowe <code class="directive"><a href="/mod/mod_include.html#xbithack">XBitHack</a></code>).
a2a0abd88b19e042a3eb2a9fa1702c25ad51303dwrowe An equal sign may be given followed by a comma (but no spaces)
8aefbd756763807188d2e3ce336a8680e4893066wrowe separated lists of options that may be set using the <code class="directive"><a href="#options">Options</a></code> command.</dd>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe AllowOverride AuthConfig Indexes
8aefbd756763807188d2e3ce336a8680e4893066wrowe <p>In the example above all directives that are neither in the group
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe <code>AuthConfig</code> nor <code>Indexes</code> cause an internal
a8d11d78181478da6a672f7fbc58b8d523351f49wrowe server error.</p>
23c6309e36a63b13b61c35999c978017521993d6wrowe <div class="note"><p>For security and performance reasons, do not set
23c6309e36a63b13b61c35999c978017521993d6wrowe <code>AllowOverride</code> to anything other than <code>None</code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker in your <code><Directory /></code> block. Instead, find (or
23c6309e36a63b13b61c35999c978017521993d6wrowe create) the <code><Directory></code> block that refers to the
8aefbd756763807188d2e3ce336a8680e4893066wrowe directory where you're actually planning to place a
8aefbd756763807188d2e3ce336a8680e4893066wrowe<li><code class="directive"><a href="#accessfilename">AccessFileName</a></code></li>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<li><a href="/configuring.html">Configuration Files</a></li>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<li><a href="/howto/htaccess.html">.htaccess Files</a></li>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<div class="directive-section"><h2><a name="CGIMapExtension" id="CGIMapExtension">CGIMapExtension</a> <a name="cgimapextension" id="cgimapextension">Directive</a></h2>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Technique for locating the interpreter for CGI
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CGIMapExtension <var>cgi-path</var> <var>.extension</var></code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
a8d11d78181478da6a672f7fbc58b8d523351f49wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>NetWare only</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe <p>This directive is used to control how Apache httpd finds the
cf6ef072483172309861d06e85b1aeff4573c060wrowe interpreter used to run CGI scripts. For example, setting
cf6ef072483172309861d06e85b1aeff4573c060wrowe cause all CGI script files with a <code>.foo</code> extension to
cf6ef072483172309861d06e85b1aeff4573c060wrowe be passed to the FOO interpreter.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<div class="directive-section"><h2><a name="ContentDigest" id="ContentDigest">ContentDigest</a> <a name="contentdigest" id="contentdigest">Directive</a></h2>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enables the generation of <code>Content-MD5</code> HTTP Response
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ContentDigest On|Off</code></td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ContentDigest Off</code></td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Options</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
69adb3d949e3dd17c0492a01fc2cf298832c7eefwrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick <p>This directive enables the generation of
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick <code>Content-MD5</code> headers as defined in RFC1864
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick respectively RFC2616.</p>
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick <p>MD5 is an algorithm for computing a "message digest"
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick (sometimes called "fingerprint") of arbitrary-length data, with
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick a high degree of confidence that any alterations in the data
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick will be reflected in alterations in the message digest.</p>
ecde48c75338ff5712f2036711f813c6dedca28ewrowe <p>The <code>Content-MD5</code> header provides an end-to-end
d75626f0952c6152a99acd013a4f127d46f0f9edtrawick message integrity check (MIC) of the entity-body. A proxy or
ecde48c75338ff5712f2036711f813c6dedca28ewrowe client may check this header for detecting accidental
ecde48c75338ff5712f2036711f813c6dedca28ewrowe modification of the entity-body in transit. Example header:</p>
ecde48c75338ff5712f2036711f813c6dedca28ewrowe Content-MD5: AuLb7Dp1rqtRtxz2m9kRpA==
cf6ef072483172309861d06e85b1aeff4573c060wrowe <p>Note that this can cause performance problems on your server
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar since the message digest is computed on every request (the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe values are not cached).</p>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p><code>Content-MD5</code> is only sent for documents served
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe by the <code class="module"><a href="/mod/core.html">core</a></code>, and not by any module. For example,
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar SSI documents, output from CGI scripts, and byte range responses
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe do not have this header.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="directive-section"><h2><a name="DefaultType" id="DefaultType">DefaultType</a> <a name="defaulttype" id="defaulttype">Directive</a></h2>
23c6309e36a63b13b61c35999c978017521993d6wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>This directive has no effect other than to emit warnings
4f9c22c4f27571d54197be9674e1fc0d528192aestrikerif the value is not <code>none</code>. In prior versions, DefaultType
4f9c22c4f27571d54197be9674e1fc0d528192aestrikerwould specify a default media type to assign to response content for
4f9c22c4f27571d54197be9674e1fc0d528192aestrikerwhich no other media type configuration could be found.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DefaultType <var>media-type|none</var></code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DefaultType none</code></td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
a9a4544168a37b43bd180b3703ccee995f27a80awrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The argument <code>none</code> is available in Apache httpd 2.2.7 and later. All other choices are DISABLED for 2.3.x and later.</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>This directive has been disabled. For backwards compatibility
a9a4544168a37b43bd180b3703ccee995f27a80awrowe of configuration files, it may be specified with the value
a9a4544168a37b43bd180b3703ccee995f27a80awrowe <code>none</code>, meaning no default media type. For example:</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker DefaultType None
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar httpd-2.2.7 and later.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <code class="directive"><a href="/mod/mod_mime.html#addtype">AddType</a></code> to configure media
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe type assignments via file extensions, or the
8aefbd756763807188d2e3ce336a8680e4893066wrowe <code class="directive"><a href="#forcetype">ForceType</a></code> directive to configure
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe the media type for specific resources. Otherwise, the server will
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe send the response without a Content-Type header field and the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe recipient may attempt to guess the media type.</p>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<div class="directive-section"><h2><a name="Define" id="Define">Define</a> <a name="define" id="define">Directive</a></h2>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define the existence of a variable</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Define <var>parameter-name</var></code></td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe <p>Equivalent to passing the <code>-D</code> argument to <code class="program"><a href="/programs/httpd.html">httpd</a></code>.</p>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>This directive can be used to toggle the use of <code class="directive"><a href="#ifdefine"><IfDefine></a></code> sections without needing to alter
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
2fd8d1e14fc47762d1e01660b544d5e2a75c825dtrawick<div class="directive-section"><h2><a name="Directory" id="Directory"><Directory></a> <a name="directory" id="directory">Directive</a></h2>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of directives that apply only to the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowenamed file-system directory, sub-directories, and their contents.</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><Directory <var>directory-path</var>>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe <p><code class="directive"><Directory></code> and
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <code></Directory></code> are used to enclose a group of
4f9c22c4f27571d54197be9674e1fc0d528192aestriker directives that will apply only to the named directory,
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe sub-directories of that directory, and the files within the respective
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe directories. Any directive that is allowed
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe in a directory context may be used. <var>Directory-path</var> is
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe either the full path to a directory, or a wild-card string using
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe Unix shell-style matching. In a wild-card string, <code>?</code> matches
59513b1275fdc2021d4949ee03ae8229469abb86wrowe any single character, and <code>*</code> matches any sequences of
4f9c22c4f27571d54197be9674e1fc0d528192aestriker characters. You may also use <code>[]</code> character ranges. None
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe of the wildcards match a `/' character, so <code><Directory
4f9c22c4f27571d54197be9674e1fc0d528192aestriker /*/public_html></code> will not match
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <code>/home/user/public_html</code>, but <code><Directory
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe /home/*/public_html></code> will match. Example:</p>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe Options Indexes FollowSymLinks<br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe </Directory>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>Be careful with the <var>directory-path</var> arguments:
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe They have to literally match the filesystem path which Apache httpd uses
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe to access the files. Directives applied to a particular
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <code><Directory></code> will not apply to files accessed from
cf6ef072483172309861d06e85b1aeff4573c060wrowe that same directory via a different path, such as via different symbolic
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p><a class="glossarylink" href="/glossary.html#regex" title="see glossary">Regular
4f9c22c4f27571d54197be9674e1fc0d528192aestriker expressions</a> can also be used, with the addition of the
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <Directory ~ "^/www/.*/[0-9]{3}">
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>would match directories in <code>/www/</code> that consisted of
4f9c22c4f27571d54197be9674e1fc0d528192aestriker three numbers.</p>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>If multiple (non-regular expression) <code class="directive"><Directory></code> sections
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe match the directory (or one of its parents) containing a document,
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe then the directives are applied in the order of shortest match
4f9c22c4f27571d54197be9674e1fc0d528192aestriker first, interspersed with the directives from the <a href="#accessfilename">.htaccess</a> files. For example,
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <Directory /><br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe AllowOverride None<br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker </Directory><br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <Directory /home/><br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe AllowOverride FileInfo<br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe </Directory>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>for access to the document <code>/home/web/dir/doc.html</code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker the steps are:</p>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <li>Apply directive <code>AllowOverride FileInfo</code> (for
38bcc87d9a06e8ba81165421403f275eca4e313btrawick <code>/home/.htaccess</code>, <code>/home/web/.htaccess</code> and
38bcc87d9a06e8ba81165421403f275eca4e313btrawick <code>/home/web/dir/.htaccess</code> in that order.</li>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>Regular expressions are not considered until after all of the
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe normal sections have been applied. Then all of the regular
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe expressions are tested in the order they appeared in the
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe configuration file. For example, with</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <Directory ~ abc$><br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe # ... directives here ...<br />
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe </Directory>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz <p>the regular expression section won't be considered until after
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe all normal <code class="directive"><Directory></code>s and
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz <code>.htaccess</code> files have been applied. Then the regular
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe expression will match on <code>/home/abc/public_html/abc</code> and
cf6ef072483172309861d06e85b1aeff4573c060wrowe the corresponding <code class="directive"><Directory></code> will
cf6ef072483172309861d06e85b1aeff4573c060wrowe be applied.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <code><Directory /></code> is <code>Allow from All</code>.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe This means that Apache httpd will serve any file mapped from an URL. It is
4f9c22c4f27571d54197be9674e1fc0d528192aestriker recommended that you change this with a block such
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <Directory /><br />
cf6ef072483172309861d06e85b1aeff4573c060wrowe Order Deny,Allow<br />
cf6ef072483172309861d06e85b1aeff4573c060wrowe Deny from All<br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker </Directory>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <em>want</em> accessible. See the <a href="/misc/security_tips.html">Security Tips</a> page for more
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz <p>The directory sections occur in the <code>httpd.conf</code> file.
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <code class="directive"><Directory></code> directives
548b2980e83f609186a76e98fb245d02e8547bc3jerenkrantz cannot nest, and cannot appear in a <code class="directive"><a href="#limit"><Limit></a></code> or <code class="directive"><a href="#limitexcept"><LimitExcept></a></code> section.</p>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz<li><a href="/sections.html">How <Directory>,
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz <Location> and <Files> sections work</a> for an
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz explanation of how these different sections are combined when a
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar request is received</li>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4fca95918a9c0ae93593806544b425d0adc2fcc3wrowe<div class="directive-section"><h2><a name="DirectoryMatch" id="DirectoryMatch"><DirectoryMatch></a> <a name="directorymatch" id="directorymatch">Directive</a></h2>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose directives that apply to
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowethe contents of file-system directories matching a regular expression.</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><DirectoryMatch <var>regex</var>>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p><code class="directive"><DirectoryMatch></code> and
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <code></DirectoryMatch></code> are used to enclose a group
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar of directives which will apply only to the named directory (and the files within),
8aefbd756763807188d2e3ce336a8680e4893066wrowe the same as <code class="directive"><a href="#directory"><Directory></a></code>.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe However, it takes as an argument a
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <a class="glossarylink" href="/glossary.html#regex" title="see glossary">regular expression</a>. For example:</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <DirectoryMatch "^/www/(.+/)?[0-9]{3}">
f08810eff40a2bddd2bc0103453c4ae775ea62bewrowe <p>would match directories in <code>/www/</code> that consisted of three
f08810eff40a2bddd2bc0103453c4ae775ea62bewrowe numbers.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Prior to 2.3.9, this directive implicitly applied to sub-directories
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe (like <code class="directive"><a href="#directory"><Directory></a></code>) and
8aefbd756763807188d2e3ce336a8680e4893066wrowe could not match the end of line symbol ($). In 2.3.9 and later,
700b96db75e7cfadb5219978c1735b710d583763wrowe only directories that match the expression are affected by the enclosed
700b96db75e7cfadb5219978c1735b710d583763wrowe directives.
700b96db75e7cfadb5219978c1735b710d583763wrowe This directive applies to requests for directories that may or may
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe not end in a trailing slash, so expressions that are anchored to the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe end of line ($) must be written with care.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<li><code class="directive"><a href="#directory"><Directory></a></code> for
700b96db75e7cfadb5219978c1735b710d583763wrowea description of how regular expressions are mixed in with normal
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<li><a href="/sections.html">How <Directory>, <Location> and
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<Files> sections work</a> for an explanation of how these different
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowesections are combined when a request is received</li>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="directive-section"><h2><a name="DocumentRoot" id="DocumentRoot">DocumentRoot</a> <a name="documentroot" id="documentroot">Directive</a></h2>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Directory that forms the main document tree visible
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DocumentRoot <var>directory-path</var></code></td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DocumentRoot /usr/local/apache/htdocs</code></td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>This directive sets the directory from which <code class="program"><a href="/programs/httpd.html">httpd</a></code>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe will serve files. Unless matched by a directive like <code class="directive"><a href="/mod/mod_alias.html#alias">Alias</a></code>, the server appends the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe path from the requested URL to the document root to make the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe path to the document. Example:</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>then an access to
700b96db75e7cfadb5219978c1735b710d583763wrowe <code>http://my.example.com/index.html</code> refers to
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <code>/usr/web/index.html</code>. If the <var>directory-path</var> is
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe not absolute then it is assumed to be relative to the <code class="directive"><a href="#serverroot">ServerRoot</a></code>.</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>The <code class="directive">DocumentRoot</code> should be specified without
700b96db75e7cfadb5219978c1735b710d583763wrowe a trailing slash.</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe<li><a href="/urlmapping.html#documentroot">Mapping URLs to Filesystem
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<div class="directive-section"><h2><a name="EnableMMAP" id="EnableMMAP">EnableMMAP</a> <a name="enablemmap" id="enablemmap">Directive</a></h2>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use memory-mapping to read files during delivery</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>EnableMMAP On|Off</code></td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>EnableMMAP On</code></td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>This directive controls whether the <code class="program"><a href="/programs/httpd.html">httpd</a></code> may use
700b96db75e7cfadb5219978c1735b710d583763wrowe memory-mapping if it needs to read the contents of a file during
700b96db75e7cfadb5219978c1735b710d583763wrowe delivery. By default, when the handling of a request requires
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe access to the data within a file -- for example, when delivering a
700b96db75e7cfadb5219978c1735b710d583763wrowe server-parsed file using <code class="module"><a href="/mod/mod_include.html">mod_include</a></code> -- Apache httpd
700b96db75e7cfadb5219978c1735b710d583763wrowe memory-maps the file if the OS supports it.</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>This memory-mapping sometimes yields a performance improvement.
700b96db75e7cfadb5219978c1735b710d583763wrowe But in some environments, it is better to disable the memory-mapping
700b96db75e7cfadb5219978c1735b710d583763wrowe to prevent operational problems:</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe <li>On some multiprocessor systems, memory-mapping can reduce the
700b96db75e7cfadb5219978c1735b710d583763wrowe performance of the <code class="program"><a href="/programs/httpd.html">httpd</a></code>.</li>
700b96db75e7cfadb5219978c1735b710d583763wrowe <li>Deleting or truncating a file while <code class="program"><a href="/programs/httpd.html">httpd</a></code>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar has it memory-mapped can cause <code class="program"><a href="/programs/httpd.html">httpd</a></code> to
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe crash with a segmentation fault.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>For server configurations that are vulnerable to these problems,
700b96db75e7cfadb5219978c1735b710d583763wrowe you should disable memory-mapping of delivered files by specifying:</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe EnableMMAP Off
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>For NFS mounted files, this feature may be disabled explicitly for
700b96db75e7cfadb5219978c1735b710d583763wrowe the offending files by specifying:</p>
700b96db75e7cfadb5219978c1735b710d583763wrowe <Directory "/path-to-nfs-files">
700b96db75e7cfadb5219978c1735b710d583763wrowe EnableMMAP Off
700b96db75e7cfadb5219978c1735b710d583763wrowe </Directory>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="directive-section"><h2><a name="EnableSendfile" id="EnableSendfile">EnableSendfile</a> <a name="enablesendfile" id="enablesendfile">Directive</a></h2>
2520f59894a3e07fefa881ef68aaded763a8d447ben<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the kernel sendfile support to deliver files to the client</td></tr>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>EnableSendfile On|Off</code></td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>EnableSendfile Off</code></td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.0.44 and later. Default changed to Off in
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>This directive controls whether <code class="program"><a href="/programs/httpd.html">httpd</a></code> may use the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe sendfile support from the kernel to transmit file contents to the client.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe By default, when the handling of a request requires no access
8aefbd756763807188d2e3ce336a8680e4893066wrowe to the data within a file -- for example, when delivering a
4f9c22c4f27571d54197be9674e1fc0d528192aestriker static file -- Apache httpd uses sendfile to deliver the file contents
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz without ever reading the file if the OS supports it.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>This sendfile mechanism avoids separate read and send operations,
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz and buffer allocations. But on some platforms or within some
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe filesystems, it is better to disable this feature to avoid
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz operational problems:</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <li>Some platforms may have broken sendfile support that the build
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe system did not detect, especially if the binaries were built on
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe another box and moved to such a machine with broken sendfile
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz support.</li>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz <li>On Linux the use of sendfile triggers TCP-checksum
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz offloading bugs on certain networking cards when using IPv6.</li>
0e58e92812f2f679d6bf2ff66cbcfa6c1d1e14bbjerenkrantz <li>On Linux on Itanium, sendfile may be unable to handle files
8aefbd756763807188d2e3ce336a8680e4893066wrowe over 2GB in size.</li>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <li>With a network-mounted <code class="directive"><a href="#documentroot">DocumentRoot</a></code> (e.g., NFS, SMB, CIFS, FUSE),
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe the kernel may be unable to serve the network file through
4f9c22c4f27571d54197be9674e1fc0d528192aestriker its own cache.</li>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p>For server configurations that are not vulnerable to these problems,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe you may enable this feature by specifying:</p>
cf6ef072483172309861d06e85b1aeff4573c060wrowe EnableSendfile On
cf6ef072483172309861d06e85b1aeff4573c060wrowe <p>For network mounted files, this feature may be disabled explicitly
cf6ef072483172309861d06e85b1aeff4573c060wrowe for the offending files by specifying:</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <Directory "/path-to-nfs-files">
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe EnableSendfile Off
700b96db75e7cfadb5219978c1735b710d583763wrowe </Directory>
69adb3d949e3dd17c0492a01fc2cf298832c7eefwrowe <p>Please note that the per-directory and .htaccess configuration
cf6ef072483172309861d06e85b1aeff4573c060wrowe of <code class="directive">EnableSendfile</code> is not supported by
cf6ef072483172309861d06e85b1aeff4573c060wrowe <code class="module"><a href="/mod/mod_cache_disk.html">mod_cache_disk</a></code>.
cf6ef072483172309861d06e85b1aeff4573c060wrowe Only global definition of <code class="directive">EnableSendfile</code>
cf6ef072483172309861d06e85b1aeff4573c060wrowe is taken into account by the module.
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<div class="directive-section"><h2><a name="Error" id="Error">Error</a> <a name="error" id="error">Directive</a></h2>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Abort configuration parsing with a custom error message</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Error <var>message</var></code></td></tr>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.3.9 and later</td></tr>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <p>If an error can be detected within the configuration, this
c2cf53a40a9814eb91db2cdf820f97d943f21628coar directive can be used to generate a custom error message, and halt
8aefbd756763807188d2e3ce336a8680e4893066wrowe configuration parsing. The typical use is for reporting required
cf6ef072483172309861d06e85b1aeff4573c060wrowe modules which are missing from the configuration.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe # ensure that mod_include is loaded<br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <IfModule !include_module><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Error mod_include is required by mod_foo. Load it with LoadModule.<br />
8aefbd756763807188d2e3ce336a8680e4893066wrowe </IfModule><br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker # ensure that exactly one of SSL,NOSSL is defined<br />
cf6ef072483172309861d06e85b1aeff4573c060wrowe <IfDefine SSL><br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <IfDefine NOSSL><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Error Both SSL and NOSSL are defined. Define only one of them.<br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe </IfDefine><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe </IfDefine><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <IfDefine !SSL><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <IfDefine !NOSSL><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Error Either SSL or NOSSL must be defined.<br />
69adb3d949e3dd17c0492a01fc2cf298832c7eefwrowe </IfDefine><br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe </IfDefine><br />
cadddb2c31d24d48f4017db4df0a29687432326cwrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cadddb2c31d24d48f4017db4df0a29687432326cwrowe<div class="directive-section"><h2><a name="ErrorDocument" id="ErrorDocument">ErrorDocument</a> <a name="errordocument" id="errordocument">Directive</a></h2>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>What the server will return to the client
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ErrorDocument <var>error-code</var> <var>document</var></code></td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
cf6ef072483172309861d06e85b1aeff4573c060wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>In the event of a problem or error, Apache httpd can be configured
2d399cd7535887fceaa9f8f116eb98ce68ddd602trawick to do one of four things,</p>
ecde48c75338ff5712f2036711f813c6dedca28ewrowe <li>redirect to a local <var>URL-path</var> to handle the
ecde48c75338ff5712f2036711f813c6dedca28ewrowe <li>redirect to an external <var>URL</var> to handle the
ecde48c75338ff5712f2036711f813c6dedca28ewrowe <p>The first option is the default, while options 2-4 are
ecde48c75338ff5712f2036711f813c6dedca28ewrowe configured using the <code class="directive">ErrorDocument</code>
ecde48c75338ff5712f2036711f813c6dedca28ewrowe directive, which is followed by the HTTP response code and a URL
ecde48c75338ff5712f2036711f813c6dedca28ewrowe or a message. Apache httpd will sometimes offer additional information
ecde48c75338ff5712f2036711f813c6dedca28ewrowe <p>URLs can begin with a slash (/) for local web-paths (relative
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe to the <code class="directive"><a href="#documentroot">DocumentRoot</a></code>), or be a
8aefbd756763807188d2e3ce336a8680e4893066wrowe full URL which the client can resolve. Alternatively, a message
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe can be provided to be displayed by the browser. Examples:</p>
cf6ef072483172309861d06e85b1aeff4573c060wrowe ErrorDocument 500 http://foo.example.com/cgi-bin/tester<br />
69adb3d949e3dd17c0492a01fc2cf298832c7eefwrowe ErrorDocument 403 "Sorry can't allow you access today"
cf6ef072483172309861d06e85b1aeff4573c060wrowe <p>Additionally, the special value <code>default</code> can be used
cf6ef072483172309861d06e85b1aeff4573c060wrowe to specify Apache httpd's simple hardcoded message. While not required
cf6ef072483172309861d06e85b1aeff4573c060wrowe under normal circumstances, <code>default</code> will restore
cf6ef072483172309861d06e85b1aeff4573c060wrowe Apache httpd's simple hardcoded message for configurations that would
cf6ef072483172309861d06e85b1aeff4573c060wrowe otherwise inherit an existing <code class="directive">ErrorDocument</code>.</p>
cf6ef072483172309861d06e85b1aeff4573c060wrowe ErrorDocument 404 default<br />
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe </Directory>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>Note that when you specify an <code class="directive">ErrorDocument</code>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe that points to a remote URL (ie. anything with a method such as
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <code>http</code> in front of it), Apache HTTP Server will send a redirect to the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe client to tell it where to find the document, even if the
4f9c22c4f27571d54197be9674e1fc0d528192aestriker document ends up being on the same server. This has several
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe implications, the most important being that the client will not
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe receive the original error status code, but instead will
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar receive a redirect status code. This in turn can confuse web
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe robots and other clients which try to determine if a URL is
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar valid using the status code. In addition, if you use a remote
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe URL in an <code>ErrorDocument 401</code>, the client will not
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar know to prompt the user for a password since it will not
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe receive the 401 status code. Therefore, <strong>if you use an
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <code>ErrorDocument 401</code> directive then it must refer to a local
700b96db75e7cfadb5219978c1735b710d583763wrowe <p>Microsoft Internet Explorer (MSIE) will by default ignore
700b96db75e7cfadb5219978c1735b710d583763wrowe server-generated error messages when they are "too small" and substitute
700b96db75e7cfadb5219978c1735b710d583763wrowe its own "friendly" error messages. The size threshold varies depending on
700b96db75e7cfadb5219978c1735b710d583763wrowe the type of error, but in general, if you make your error document
700b96db75e7cfadb5219978c1735b710d583763wrowe greater than 512 bytes, then MSIE will show the server-generated
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe error rather than masking it. More information is available in
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Microsoft Knowledge Base article <a href="http://support.microsoft.com/default.aspx?scid=kb;en-us;Q294807">Q294807</a>.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>Although most error messages can be overriden, there are certain
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe circumstances where the internal messages are used regardless of the
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe setting of <code class="directive"><a href="#errordocument">ErrorDocument</a></code>. In
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe particular, if a malformed request is detected, normal request processing
700b96db75e7cfadb5219978c1735b710d583763wrowe will be immediately halted and the internal error message returned.
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe This is necessary to guard against security problems caused by
4f9c22c4f27571d54197be9674e1fc0d528192aestriker bad requests.</p>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>If you are using mod_proxy, you may wish to enable
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <code class="directive"><a href="/mod/mod_proxy.html#proxyerroroverride">ProxyErrorOverride</a></code> so that you can provide
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe custom error messages on behalf of your Origin servers. If you don't enable ProxyErrorOverride,
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe Apache httpd will not generate custom error documents for proxied content.</p>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<div class="directive-section"><h2><a name="ErrorLog" id="ErrorLog">ErrorLog</a> <a name="errorlog" id="errorlog">Directive</a></h2>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Location where the server will log errors</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code> ErrorLog <var>file-path</var>|syslog[:<var>facility</var>]</code></td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ErrorLog logs/error_log (Unix) ErrorLog logs/error.log (Windows and OS/2)</code></td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe <p>The <code class="directive">ErrorLog</code> directive sets the name of
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe the file to which the server will log any errors it encounters. If
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar the <var>file-path</var> is not absolute then it is assumed to be
e4a3f3c2f080cac75a15a6454cca429b8161c050wrowe relative to the <code class="directive"><a href="#serverroot">ServerRoot</a></code>.</p>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar begins with a pipe character "<code>|</code>" then it is assumed to be a
0ec08ecdcb42129d147888bda504787b164da39cerikabele command to spawn to handle the error log.</p>
8aefbd756763807188d2e3ce336a8680e4893066wrowe <p>See the notes on <a href="/logs.html#piped">piped logs</a> for
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe more information.</p>
8aefbd756763807188d2e3ce336a8680e4893066wrowe <p>Using <code>syslog</code> instead of a filename enables logging
8aefbd756763807188d2e3ce336a8680e4893066wrowe via syslogd(8) if the system supports it. The default is to use
c2cf53a40a9814eb91db2cdf820f97d943f21628coar syslog facility <code>local7</code>, but you can override this by
c2cf53a40a9814eb91db2cdf820f97d943f21628coar using the <code>syslog:<var>facility</var></code> syntax where
2d399cd7535887fceaa9f8f116eb98ce68ddd602trawick <var>facility</var> can be one of the names usually documented in
c2cf53a40a9814eb91db2cdf820f97d943f21628coar syslog(1). The facility is effectively global, and if it is changed
8aefbd756763807188d2e3ce336a8680e4893066wrowe in individual virtual hosts, the final facility specified affects the
8aefbd756763807188d2e3ce336a8680e4893066wrowe entire server.</p>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe ErrorLog syslog:user
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe <p>SECURITY: See the <a href="/misc/security_tips.html#serverroot">security tips</a>
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe document for details on why your security could be compromised
1b315ee865b0f11e582beb64127ca3a99a319d2fwrowe if the directory where log files are stored is writable by
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar anyone other than the user that starts the server.</p>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p>When entering a file path on non-Unix platforms, care should be taken
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar to make sure that only forward slashes are used even though the platform
0540a0b469147b52e858587270dba31c2aaa9e09wrowe may allow the use of back slashes. In general it is a good idea to always
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar use forward slashes throughout the configuration files.</p>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<li><code class="directive"><a href="#loglevel">LogLevel</a></code></li>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<li><a href="/logs.html">Apache HTTP Server Log Files</a></li>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<div class="directive-section"><h2><a name="ErrorLogFormat" id="ErrorLogFormat">ErrorLogFormat</a> <a name="errorlogformat" id="errorlogformat">Directive</a></h2>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Format specification for error log entries</td></tr>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code> ErrorLog [connection|request] <var>format</var></code></td></tr>
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
8aefbd756763807188d2e3ce336a8680e4893066wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.3.9 and later</td></tr>
a2a0abd88b19e042a3eb2a9fa1702c25ad51303dwrowe <p><code class="directive">ErrorLogFormat</code> allows to specify what
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb supplementary information is logged in the error log in addition to the
948096a99010fccf648814fecf38f75c689172d7wrowe actual log message.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker ErrorLogFormat "[%t] [%l] [pid %P] %F: %E: [client %a] %M"
948096a99010fccf648814fecf38f75c689172d7wrowe <p>Specifying <code>connection</code> or <code>request</code> as first
948096a99010fccf648814fecf38f75c689172d7wrowe paramter allows to specify additional formats, causing additional
948096a99010fccf648814fecf38f75c689172d7wrowe information to be logged when the first message is logged for a specific
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe connection or request, respectivly. This additional information is only
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe logged once per connection/request. If a connection or request is processed
053497224246c4dbef9af594cacf5c00ed271e6cwrowe without causing any log message, the additional information is not logged
0540a0b469147b52e858587270dba31c2aaa9e09wrowe either.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>It can happen that some format string items do not produce output. For
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb example, the Referer header is only present if the log message is
42da244268b11ec661b528510f80a18b73c51727brianp associated to a request and the log message happens at a time when the
42da244268b11ec661b528510f80a18b73c51727brianp Referer header has already been read from the client. If no output is
948096a99010fccf648814fecf38f75c689172d7wrowe produced, the default behaviour is to delete everything from the preceeding
948096a99010fccf648814fecf38f75c689172d7wrowe space character to the next space character. This means the log line is
948096a99010fccf648814fecf38f75c689172d7wrowe implicitly divided into fields on non-whitespace to whitespace transitions.
948096a99010fccf648814fecf38f75c689172d7wrowe If a format string item does not produce output, the whole field is
948096a99010fccf648814fecf38f75c689172d7wrowe ommitted. For example, if the remote address <code>%a</code> in the log
948096a99010fccf648814fecf38f75c689172d7wrowe format <code>[%t] [%l] [%a] %M </code> is not available, the surrounding
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz brackets are not logged either. Space characters can be escaped with a
948096a99010fccf648814fecf38f75c689172d7wrowe backslash to prevent them from delimiting a field. The combination '% '
948096a99010fccf648814fecf38f75c689172d7wrowe (percent space) is a zero-witdh field delimiter that does not produce any
948096a99010fccf648814fecf38f75c689172d7wrowe output.</p>
948096a99010fccf648814fecf38f75c689172d7wrowe <p>The above behaviour can be changed by adding modifiers to the format
948096a99010fccf648814fecf38f75c689172d7wrowe string item. A <code>-</code> (minus) modifier causes a minus to be logged if the
053497224246c4dbef9af594cacf5c00ed271e6cwrowe respective item does not produce any output. In once-per-connection/request
948096a99010fccf648814fecf38f75c689172d7wrowe formats, it is also possible to use the <code>+</code> (plus) modifier. If an
948096a99010fccf648814fecf38f75c689172d7wrowe item with the plus modifier does not produce any output, the whole line is
948096a99010fccf648814fecf38f75c689172d7wrowe ommitted.</p>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <p>A number as modifier can be used to assign a log severity level to a
4f9c22c4f27571d54197be9674e1fc0d528192aestriker format item. The item will only be logged if the severity of the log
c2cf53a40a9814eb91db2cdf820f97d943f21628coar message is not higher than the specified log severity level. The number can
948096a99010fccf648814fecf38f75c689172d7wrowe range from 1 (alert) over 4 (warn) and 7 (debug) to 15 (trace8).</p>
948096a99010fccf648814fecf38f75c689172d7wrowe <p>Some format string items accept additional parameters in braces.</p>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe <table class="bordered"><tr class="header"><th>Format String</th> <th>Description</th></tr>
a9a4544168a37b43bd180b3703ccee995f27a80awrowe <td>Request environment variable <code>name</code></td></tr>
948096a99010fccf648814fecf38f75c689172d7wrowe <td>Source file name and line number of the log call</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <td>Number of keep-alive requests on this connection</td></tr>
948096a99010fccf648814fecf38f75c689172d7wrowe <td>Log ID of the connection if used in connection scope, empty otherwise</td></tr>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe <td>The current time including micro-seconds</td></tr>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe <td>The current time in compact ISO 8601 format, including
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <td>The canonical <code class="directive"><a href="#servername">ServerName</a></code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <td>The server name of the server serving the request according to the
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <code class="directive"><a href="#usecanonicalname">UseCanonicalName</a></code>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><td><code>\ </code> (backslash space)</td>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr class="odd"><td><code>% </code> (percent space)</td>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe <p>The log ID format <code>%L</code> produces a unique id for a connection
948096a99010fccf648814fecf38f75c689172d7wrowe or request. This can be used to correlate which log lines belong to the
948096a99010fccf648814fecf38f75c689172d7wrowe same connection or request, which request happens on which connection.
948096a99010fccf648814fecf38f75c689172d7wrowe <code class="module"><a href="/mod/mod_log_config.html">mod_log_config</a></code>, to allow to correlate access log entries
948096a99010fccf648814fecf38f75c689172d7wrowe with error log lines. If <code class="module"><a href="/mod/mod_unique_id.html">mod_unique_id</a></code> is loaded, its
4f9c22c4f27571d54197be9674e1fc0d528192aestriker unique id will be used as log ID for requests.</p>
948096a99010fccf648814fecf38f75c689172d7wrowe <div class="example"><h3>Example (somewhat similar to default format)</h3><p><code>
948096a99010fccf648814fecf38f75c689172d7wrowe ErrorLogFormat "[%{u}t] [%-m:%l] [pid %P] %7F: %E: [client\ %a]
948096a99010fccf648814fecf38f75c689172d7wrowe %M% ,\ referer\ %{Referer}i"
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <div class="example"><h3>Example (similar to the 2.2.x format)</h3><p><code>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar ErrorLogFormat "[%t] [%l] %7F: %E: [client\ %a]
4f9c22c4f27571d54197be9674e1fc0d528192aestriker %M% ,\ referer\ %{Referer}i"
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <div class="example"><h3>Advanced example with request/connection log IDs</h3><p><code>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar ErrorLogFormat "[%{uc}t] [%-m:%-l] [R:%L] [C:%{C}L] %7F: %E: %M"<br />
0540a0b469147b52e858587270dba31c2aaa9e09wrowe ErrorLogFormat request "[%{uc}t] [R:%L] Request %k on C:%{c}L pid:%P tid:%T"<br />
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar ErrorLogFormat request "[%{uc}t] [R:%L] UA:'%+{User-Agent}i'"<br />
696218c49632c863d18b25fa52ab63617088cb38wrowe ErrorLogFormat request "[%{uc}t] [R:%L] Referer:'%+{Referer}i'"<br />
948096a99010fccf648814fecf38f75c689172d7wrowe ErrorLogFormat connection "[%{uc}t] [C:%{c}L] local\ %a remote\ %A"<br />
948096a99010fccf648814fecf38f75c689172d7wrowe<li><code class="directive"><a href="#errorlog">ErrorLog</a></code></li>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe<li><code class="directive"><a href="#loglevel">LogLevel</a></code></li>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<li><a href="/logs.html">Apache HTTP Server Log Files</a></li>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe<div class="directive-section"><h2><a name="ExtendedStatus" id="ExtendedStatus">ExtendedStatus</a> <a name="extendedstatus" id="extendedstatus">Directive</a></h2>
a9a4544168a37b43bd180b3703ccee995f27a80awrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Keep track of extended status information for each
948096a99010fccf648814fecf38f75c689172d7wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ExtendedStatus On|Off</code></td></tr>
948096a99010fccf648814fecf38f75c689172d7wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ExtendedStatus Off[*]</code></td></tr>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
053497224246c4dbef9af594cacf5c00ed271e6cwrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
948096a99010fccf648814fecf38f75c689172d7wrowe <p>This option tracks additional data per worker about the
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar currently executing request, and a utilization summary; you
948096a99010fccf648814fecf38f75c689172d7wrowe can see these variables during runtime by configuring
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code class="module"><a href="/mod/mod_status.html">mod_status</a></code>. Note that other modules may
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb rely on this scoreboard.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>This setting applies to the entire server, and cannot be
a2a0abd88b19e042a3eb2a9fa1702c25ad51303dwrowe enabled or disabled on a virtualhost-by-virtualhost basis.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb The collection of extended status information can slow down
aa047239dedf0d26e8efecfade32e7337f35df19wrowe the server. Also note that this setting cannot be changed
aa047239dedf0d26e8efecfade32e7337f35df19wrowe during a graceful restart.</p>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe <p>Note that loading <code class="module"><a href="/mod/mod_status.html">mod_status</a></code> will change
aa047239dedf0d26e8efecfade32e7337f35df19wrowe the default behavior to ExtendedStatus On, while other
aa047239dedf0d26e8efecfade32e7337f35df19wrowe third party modules may do the same. Such modules rely on
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb collecting detailed information about the state of all workers.
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe The default is changed by <code class="module"><a href="/mod/mod_status.html">mod_status</a></code> beginning
4f9c22c4f27571d54197be9674e1fc0d528192aestriker with version 2.3.6; the previous default was always Off.</p>
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe<div class="directive-section"><h2><a name="FileETag" id="FileETag">FileETag</a> <a name="fileetag" id="fileetag">Directive</a></h2>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>File attributes used to create the ETag
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>FileETag <var>component</var> ...</code></td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>FileETag INode MTime Size</code></td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe The <code class="directive">FileETag</code> directive configures the file
aa047239dedf0d26e8efecfade32e7337f35df19wrowe attributes that are used to create the <code>ETag</code> (entity
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb tag) response header field when the document is based on a static file.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb (The <code>ETag</code> value is used in cache management to save
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz network bandwidth.) The
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code class="directive">FileETag</code> directive allows you to choose
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb which of these -- if any -- should be used. The recognized keywords are:
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <dd>The file's i-node number will be included in the calculation</dd>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <dd>The date and time the file was last modified will be included</dd>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <dd>The number of bytes in the file will be included</dd>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <dd>All available fields will be used. This is equivalent to:
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <div class="example"><p><code>FileETag INode MTime Size</code></p></div></dd>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <dd>If a document is file-based, no <code>ETag</code> field will be
aa047239dedf0d26e8efecfade32e7337f35df19wrowe included in the response</dd>
a9a4544168a37b43bd180b3703ccee995f27a80awrowe <p>The <code>INode</code>, <code>MTime</code>, and <code>Size</code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker keywords may be prefixed with either <code>+</code> or <code>-</code>,
a9a4544168a37b43bd180b3703ccee995f27a80awrowe which allow changes to be made to the default setting inherited
a9a4544168a37b43bd180b3703ccee995f27a80awrowe from a broader scope. Any keyword appearing without such a prefix
aa047239dedf0d26e8efecfade32e7337f35df19wrowe immediately and completely cancels the inherited setting.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>If a directory's configuration includes
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <code>FileETag INode MTime Size</code>, and a
aa047239dedf0d26e8efecfade32e7337f35df19wrowe subdirectory's includes <code>FileETag -INode</code>,
c2cf53a40a9814eb91db2cdf820f97d943f21628coar the setting for that subdirectory (which will be inherited by
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar any sub-subdirectories that don't override it) will be equivalent to
4f9c22c4f27571d54197be9674e1fc0d528192aestriker Do not change the default for directories or locations that have WebDAV
aa047239dedf0d26e8efecfade32e7337f35df19wrowe enabled and use <code class="module"><a href="/mod/mod_dav_fs.html">mod_dav_fs</a></code> as a storage provider.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <code class="module"><a href="/mod/mod_dav_fs.html">mod_dav_fs</a></code> uses <code>INode MTime Size</code>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe as a fixed format for <code>ETag</code> comparisons on conditional requests.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe These conditional requests will break if the <code>ETag</code> format is
aa047239dedf0d26e8efecfade32e7337f35df19wrowe An ETag is not generated for responses parsed by <code class="module"><a href="/mod/mod_include.html">mod_include</a></code>,
aa047239dedf0d26e8efecfade32e7337f35df19wrowe since the response entity can change without a change of the INode, MTime, or Size
aa047239dedf0d26e8efecfade32e7337f35df19wrowe of the static file with embedded SSI directives.
0540a0b469147b52e858587270dba31c2aaa9e09wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<div class="directive-section"><h2><a name="Files" id="Files"><Files></a> <a name="files" id="files">Directive</a></h2>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Contains directives that apply to matched
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><Files <var>filename</var>> ... </Files></code></td></tr>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <p>The <code class="directive"><Files></code> directive
aa047239dedf0d26e8efecfade32e7337f35df19wrowe limits the scope of the enclosed directives by filename. It is comparable
0540a0b469147b52e858587270dba31c2aaa9e09wrowe to the <code class="directive"><a href="#directory"><Directory></a></code>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe and <code class="directive"><a href="#location"><Location></a></code>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe directives. It should be matched with a <code></Files></code>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe directive. The directives given within this section will be applied to
aa047239dedf0d26e8efecfade32e7337f35df19wrowe any object with a basename (last component of filename) matching the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb specified filename. <code class="directive"><Files></code>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker sections are processed in the order they appear in the
aa047239dedf0d26e8efecfade32e7337f35df19wrowe configuration file, after the <code class="directive"><a href="#directory"><Directory></a></code> sections and
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <code>.htaccess</code> files are read, but before <code class="directive"><a href="#location"><Location></a></code> sections. Note
aa047239dedf0d26e8efecfade32e7337f35df19wrowe that <code class="directive"><Files></code> can be nested
aa047239dedf0d26e8efecfade32e7337f35df19wrowe inside <code class="directive"><a href="#directory"><Directory></a></code> sections to restrict the
aa047239dedf0d26e8efecfade32e7337f35df19wrowe portion of the filesystem they apply to.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>The <var>filename</var> argument should include a filename, or
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar a wild-card string, where <code>?</code> matches any single character,
4f9c22c4f27571d54197be9674e1fc0d528192aestriker and <code>*</code> matches any sequences of characters.
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <a class="glossarylink" href="/glossary.html#regex" title="see glossary">Regular expressions</a>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe can also be used, with the addition of the
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <Files ~ "\.(gif|jpe?g|png)$">
0540a0b469147b52e858587270dba31c2aaa9e09wrowe <p>would match most common Internet graphics formats. <code class="directive"><a href="#filesmatch"><FilesMatch></a></code> is preferred,
aa047239dedf0d26e8efecfade32e7337f35df19wrowe however.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>Note that unlike <code class="directive"><a href="#directory"><Directory></a></code> and <code class="directive"><a href="#location"><Location></a></code> sections, <code class="directive"><Files></code> sections can be used inside
aa047239dedf0d26e8efecfade32e7337f35df19wrowe <code>.htaccess</code> files. This allows users to control access to
aa047239dedf0d26e8efecfade32e7337f35df19wrowe their own files, at a file-by-file level.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><a href="/sections.html">How <Directory>, <Location>
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe and <Files> sections work</a> for an explanation of how these
a9a4544168a37b43bd180b3703ccee995f27a80awrowe different sections are combined when a request is received</li>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<div class="directive-section"><h2><a name="FilesMatch" id="FilesMatch"><FilesMatch></a> <a name="filesmatch" id="filesmatch">Directive</a></h2>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Contains directives that apply to regular-expression matched
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><FilesMatch <var>regex</var>> ... </FilesMatch></code></td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
aa047239dedf0d26e8efecfade32e7337f35df19wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
dc8692c6c0ca616a09aa12dad005f2ef23baa1a0wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>The <code class="directive"><FilesMatch></code> directive
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb limits the scope of the enclosed directives by filename, just as the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code class="directive"><a href="#files"><Files></a></code> directive
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb does. However, it accepts a <a class="glossarylink" href="/glossary.html#regex" title="see glossary">regular
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <FilesMatch "\.(gif|jpe?g|png)$">
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>would match most common Internet graphics formats.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><a href="/sections.html">How <Directory>, <Location>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb and <Files> sections work</a> for an explanation of how these
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb different sections are combined when a request is received</li>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div class="directive-section"><h2><a name="ForceType" id="ForceType">ForceType</a> <a name="forcetype" id="forcetype">Directive</a></h2>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Forces all matching files to be served with the specified
4f9c22c4f27571d54197be9674e1fc0d528192aestrikermedia type in the HTTP Content-Type header field</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ForceType <var>media-type</var>|None</code></td></tr>
6fd5761878f22fb9a2de0835807a29784bf367abtrawick<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Moved to the core in Apache httpd 2.0</td></tr>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <p>When placed into an <code>.htaccess</code> file or a
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <code class="directive"><a href="#directory"><Directory></a></code>, or
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <code class="directive"><a href="#location"><Location></a></code> or
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <code class="directive"><a href="#files"><Files></a></code>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe section, this directive forces all matching files to be served
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe with the content type identification given by
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe <var>media-type</var>. For example, if you had a directory full of
fa06de8a28a737e8fbaad76d7f3ff67aaa5e4a09wrowe GIF files, but did not want to label them all with <code>.gif</code>,
4f9c22c4f27571d54197be9674e1fc0d528192aestriker you might want to use:</p>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <p>Note that this directive overrides other indirect media type
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe associations defined in mime.types or via the
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <code class="directive"><a href="/mod/mod_mime.html#addtype">AddType</a></code>.</p>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <p>You can also override more general
ebe7da316894e2b93b4a905fccd2496d0ed1bc78rbb <Location /images><br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker </Location><br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker # but normal mime-type associations here:<br />
e57e920838f31508f1418aa4c25ce55b345b2cebrbb ForceType None<br />
e57e920838f31508f1418aa4c25ce55b345b2cebrbb </Location>
e57e920838f31508f1418aa4c25ce55b345b2cebrbb <p>This directive primarily overrides the content types generated for
e57e920838f31508f1418aa4c25ce55b345b2cebrbb static files served out of the filesystem. For resources other than
e57e920838f31508f1418aa4c25ce55b345b2cebrbb static files, where the generator of the response typically specifies
e57e920838f31508f1418aa4c25ce55b345b2cebrbb a Content-Type, this directive has no effect.</p>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe<div class="directive-section"><h2><a name="GprofDir" id="GprofDir">GprofDir</a> <a name="gprofdir" id="gprofdir">Directive</a></h2>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Directory to write gmon.out profiling data to. </td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>GprofDir <var>/tmp/gprof/</var>|<var>/tmp/gprof/</var>%</code></td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe <p>When the server has been compiled with gprof profiling suppport,
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe <code class="directive">GprofDir</code> causes <code>gmon.out</code> files to
e68544ae924174ca227ede8e2e722cefa00ea0d3wrowe be written to the specified directory when the process exits. If the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb argument ends with a percent symbol ('%'), subdirectories are created
c2cf53a40a9814eb91db2cdf820f97d943f21628coar for each process id.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>This directive currently only works with the <code class="module"><a href="/mod/prefork.html">prefork</a></code>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<div class="directive-section"><h2><a name="HostnameLookups" id="HostnameLookups">HostnameLookups</a> <a name="hostnamelookups" id="hostnamelookups">Directive</a></h2>
68b29bcadd6c46aecdc9fe14c93555a2238ad2aagregames<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enables DNS lookups on client IP addresses</td></tr>
68b29bcadd6c46aecdc9fe14c93555a2238ad2aagregames<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>HostnameLookups On|Off|Double</code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>HostnameLookups Off</code></td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>This directive enables DNS lookups so that host names can be
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb logged (and passed to CGIs/SSIs in <code>REMOTE_HOST</code>).
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb The value <code>Double</code> refers to doing double-reverse
4f9c22c4f27571d54197be9674e1fc0d528192aestriker DNS lookup. That is, after a reverse lookup is performed, a forward
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb lookup is then performed on that result. At least one of the IP
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb addresses in the forward lookup must match the original
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb address. (In "tcpwrappers" terminology this is called
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>Regardless of the setting, when <code class="module"><a href="/mod/mod_authz_host.html">mod_authz_host</a></code> is
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar used for controlling access by hostname, a double reverse lookup
4f9c22c4f27571d54197be9674e1fc0d528192aestriker will be performed. This is necessary for security. Note that the
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb result of this double-reverse isn't generally available unless you
4f9c22c4f27571d54197be9674e1fc0d528192aestriker set <code>HostnameLookups Double</code>. For example, if only
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <code>HostnameLookups On</code> and a request is made to an object
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar that is protected by hostname restrictions, regardless of whether
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb the double-reverse fails or not, CGIs will still be passed the
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>The default is <code>Off</code> in order to save the network
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb traffic for those sites that don't truly need the reverse
4f9c22c4f27571d54197be9674e1fc0d528192aestriker lookups done. It is also better for the end users because they
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb don't have to suffer the extra latency that a lookup entails.
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe Heavily loaded sites should leave this directive
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe <code>Off</code>, since DNS lookups can take considerable
e8eee56a2ea20f673e5942fb58e1426a7561c7acstas amounts of time. The utility <code class="program"><a href="/programs/logresolve.html">logresolve</a></code>, compiled by
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe default to the <code>bin</code> subdirectory of your installation
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe directory, can be used to look up host names from logged IP addresses
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb offline.</p>
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe<div class="directive-section"><h2><a name="If" id="If"><If></a> <a name="if" id="if">Directive</a></h2>
b45c1c292ff1fa635004ae81fa691f8cb3cdda85rbb<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Contains directives that apply only if a condition is
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><If <var>expression</var>> ... </If></code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
e8eee56a2ea20f673e5942fb58e1426a7561c7acstas<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
e8eee56a2ea20f673e5942fb58e1426a7561c7acstas<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>The <code class="directive"><If></code> directive
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb evaluates an expression at runtime, and applies the enclosed
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb directives if and only if the expression evaluates to true.
e8eee56a2ea20f673e5942fb58e1426a7561c7acstas For example:</p>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd <If "$req{Host} = ''">
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd <p>would match HTTP/1.0 requests without a <var>Host:</var> header.</p>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd <p>You may compare the value of any variable in the request headers
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd ($req), response headers ($resp) or environment ($env) in your
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard expression.</p>
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard <p>Apart from <code>=</code>, <code>If</code> can use the <code>IN</code>
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard operator to compare if the expression is in a given range:</p>
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard <If %{REQUEST_METHOD} IN GET,HEAD,OPTIONS>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><a href="/expr.html">Expressions in Apache HTTP Server</a>,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbbfor a complete reference and more examples.</li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><a href="/sections.html">How <Directory>, <Location>,
e8eee56a2ea20f673e5942fb58e1426a7561c7acstas <Files> sections work</a> for an explanation of how these
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb different sections are combined when a request is received.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <code class="directive"><If></code> has the same precedence
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb and usage as <code class="directive"><Files></code></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
efa1a34b0a7785fc72863eff175b0cfc1ecb0e38wrowe<div class="directive-section"><h2><a name="IfDefine" id="IfDefine"><IfDefine></a> <a name="ifdefine" id="ifdefine">Directive</a></h2>
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Encloses directives that will be processed only
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><IfDefine [!]<var>parameter-name</var>> ...
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
6c24fd6cfe148639988d5b335185ffb215662801wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe <p>The <code><IfDefine <var>test</var>>...</IfDefine>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker </code> section is used to mark directives that are conditional. The
cadddb2c31d24d48f4017db4df0a29687432326cwrowe directives within an <code class="directive"><IfDefine></code>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe section are only processed if the <var>test</var> is true. If <var>
f888346b48f5e5b5e3f0a47dedb8cefd2759a4e2gregames test</var> is false, everything between the start and end markers is
f888346b48f5e5b5e3f0a47dedb8cefd2759a4e2gregames ignored.</p>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <p>The <var>test</var> in the <code class="directive"><IfDefine></code> section directive can be one of two forms:</p>
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <p>In the former case, the directives between the start and end
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe markers are only processed if the parameter named
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <var>parameter-name</var> is defined. The second format reverses
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe the test, and only processes the directives if
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <var>parameter-name</var> is <strong>not</strong> defined.</p>
dc3a3d949b7ef46b8385858c822267e39b665c12nd <p>The <var>parameter-name</var> argument is a define as given on the
f888346b48f5e5b5e3f0a47dedb8cefd2759a4e2gregames <code class="program"><a href="/programs/httpd.html">httpd</a></code> command line via <code>-D<var>parameter</var>
f888346b48f5e5b5e3f0a47dedb8cefd2759a4e2gregames </code> at the time the server was started or by the <code class="directive"><a href="#define">Define</a></code> directive.</p>
dc3a3d949b7ef46b8385858c822267e39b665c12nd <p><code class="directive"><IfDefine></code> sections are
dc3a3d949b7ef46b8385858c822267e39b665c12nd nest-able, which can be used to implement simple
dc3a3d949b7ef46b8385858c822267e39b665c12nd multiple-parameter tests. Example:</p>
cadddb2c31d24d48f4017db4df0a29687432326cwrowe httpd -DReverseProxy -DUseCache -DMemCache ...<br />
e7505ba54ac56ae30e4e250f912f3dbaf92ca45fwrowe <IfDefine ReverseProxy><br />
cadddb2c31d24d48f4017db4df0a29687432326cwrowe LoadModule proxy_http_module modules/mod_proxy_http.so<br />
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <IfDefine UseCache><br />
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe <IfDefine MemCache><br />
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe LoadModule mem_cache_module modules/mod_mem_cache.so<br />
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe </IfDefine><br />
beda1fb2f11c52ca4612460a5d5ba47398143efbwrowe <IfDefine !MemCache><br />
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick LoadModule cache_disk_module modules/mod_cache_disk.so<br />
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick </IfDefine>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe </IfDefine>
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe </IfDefine>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<div class="directive-section"><h2><a name="IfModule" id="IfModule"><IfModule></a> <a name="ifmodule" id="ifmodule">Directive</a></h2>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Encloses directives that are processed conditional on the
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><IfModule [!]<var>module-file</var>|<var>module-identifier</var>> ...
290ecc1ddceca1ed49bc1a5338921264b5c3e07cwrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Module identifiers are available in version 2.1 and
1067418d9ed9ed9daeb3ca4f74e72db810c49833wrowe <p>The <code><IfModule <var>test</var>>...</IfModule></code>
cadddb2c31d24d48f4017db4df0a29687432326cwrowe section is used to mark directives that are conditional on the presence of
cadddb2c31d24d48f4017db4df0a29687432326cwrowe a specific module. The directives within an <code class="directive"><IfModule></code> section are only processed if the <var>test</var>
cadddb2c31d24d48f4017db4df0a29687432326cwrowe is true. If <var>test</var> is false, everything between the start and
cadddb2c31d24d48f4017db4df0a29687432326cwrowe end markers is ignored.</p>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar <p>The <var>test</var> in the <code class="directive"><IfModule></code> section directive can be one of two forms:</p>
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <p>In the former case, the directives between the start and end
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe markers are only processed if the module named <var>module</var>
cadddb2c31d24d48f4017db4df0a29687432326cwrowe is included in Apache httpd -- either compiled in or
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe dynamically loaded using <code class="directive"><a href="/mod/mod_so.html#loadmodule">LoadModule</a></code>. The second format reverses the test,
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe and only processes the directives if <var>module</var> is
cadddb2c31d24d48f4017db4df0a29687432326cwrowe <p>The <var>module</var> argument can be either the module identifier or
cadddb2c31d24d48f4017db4df0a29687432326cwrowe the file name of the module, at the time it was compiled. For example,
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <code>mod_rewrite.c</code> is the file name. If a module consists of
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe several source files, use the name of the file containing the string
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe <p><code class="directive"><IfModule></code> sections are
3cd826b00280881e5a2f03d8ec1f8d55802b93dewrowe nest-able, which can be used to implement simple multiple-module
cadddb2c31d24d48f4017db4df0a29687432326cwrowe <div class="note">This section should only be used if you need to have one
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd configuration file that works whether or not a specific module
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd is available. In normal operation, directives need not be
a8c55845ffa7170766e410dbd799353127b628f9nd placed in <code class="directive"><IfModule></code>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd sections.</div>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<div class="directive-section"><h2><a name="Include" id="Include">Include</a> <a name="include" id="include">Directive</a></h2>
1067418d9ed9ed9daeb3ca4f74e72db810c49833wrowe<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Includes other configuration files from within
1067418d9ed9ed9daeb3ca4f74e72db810c49833wrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Include [<var>optional</var>|<var>strict</var>] <var>file-path</var>|<var>directory-path</var>|<var>wildcard</var></code></td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
117026201e6d8fe7d82416b8a7324830f5a87292wrowe<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b67fb549910fa0faf4cdd8aeaf9aeab51d4b6a92wrowe<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
c2cf53a40a9814eb91db2cdf820f97d943f21628coar<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Wildcard matching available in 2.0.41 and later, directory
c2cf53a40a9814eb91db2cdf820f97d943f21628coarwildcard matching available in 2.3.6 and later</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>This directive allows inclusion of other configuration files
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb from within the server configuration files.</p>
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe <p>Shell-style (<code>fnmatch()</code>) wildcard characters can be used
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb in the filename or directory parts of the path to include several files
d2220a04f870f632b8cec1e6713dbb980ed5e386wrowe at once, in alphabetical order. In addition, if
b45c1c292ff1fa635004ae81fa691f8cb3cdda85rbb <code class="directive">Include</code> points to a directory, rather than a file,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb Apache httpd will read all files in that directory and any subdirectory.
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe However, including entire directories is not recommended, because it is
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe easy to accidentally leave temporary files in a directory that can cause
ecc4a080f07af3fbc1b91bbd00997ec1d592c6f9wrowe <code class="program"><a href="/programs/httpd.html">httpd</a></code> to fail. Instead, we encourage you to use the
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe wildcard syntax shown below, to include files that match a particular
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar pattern, such as *.conf, for example.</p>
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p>When a wildcard is specified for a <strong>file</strong> component of
4f9c22c4f27571d54197be9674e1fc0d528192aestriker the path, and no file matches the wildcard, the
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe <code class="directive"><a href="#include">Include</a></code>
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe directive will be <strong>silently ignored</strong>. When a wildcard is
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe specified for a <strong>directory</strong> component of the path, and
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe no directory matches the wildcard, the
5bb29f57ae0184d2b3c1cdf35132f8ceb011f882wrowe <code class="directive"><a href="#include">Include</a></code> directive will
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <strong>fail with an error</strong> saying the directory cannot be found.
731344ed8f3677d1661c261ca5fcdd2ee3dbc74ccoar <p>For further control over the behaviour of the server when no files or
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb directories match, prefix the path with the modifiers <var>optional</var>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb or <var>strict</var>. If <var>optional</var> is specified, any wildcard
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb file or directory that does not match will be silently ignored. If
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <var>strict</var> is specified, any wildcard file or directory that does
5b3abd2fecc712f08ad728114aa77137b9f67716wrowe not match at least one file will cause server startup to fail.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>When a directory or file component of the path is
af7e32b660b02a378e91d40987e59b28864db954jwoolley specified exactly, and that directory or file does not exist,
4f9c22c4f27571d54197be9674e1fc0d528192aestriker <code class="directive"><a href="#include">Include</a></code> directive will fail with an
c2cf53a40a9814eb91db2cdf820f97d943f21628coar error saying the file or directory cannot be found.</p>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe <p>The file path specified may be an absolute path, or may be relative
0540a0b469147b52e858587270dba31c2aaa9e09wrowe to the <code class="directive"><a href="#serverroot">ServerRoot</a></code> directory.</p>
1fbf6ba0f5207e6637b49f9a9dfcc779bbe952a9trawick <p>Or, providing paths relative to your <code class="directive"><a href="#serverroot">ServerRoot</a></code> directory:</p>
0540a0b469147b52e858587270dba31c2aaa9e09wrowe <p>Wildcards may be included in the directory or file portion of the
c2cf53a40a9814eb91db2cdf820f97d943f21628coar path. In the following example, the server will fail to load if no
c2cf53a40a9814eb91db2cdf820f97d943f21628coar directories match conf/vhosts/*, but will load successfully if no
0540a0b469147b52e858587270dba31c2aaa9e09wrowe files match *.conf.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>In this example, the server will fail to load if either
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz conf/vhosts/* matches no directories, or if *.conf matches no files:</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>In this example, the server load successfully if either conf/vhosts/*
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb matches no directories, or if *.conf matches no files:</p>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd<li><code class="program"><a href="/programs/apachectl.html">apachectl</a></code></li>
c880637396a01f4acfcf7e35fe423ced2d86c3b4nd<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<div class="directive-section"><h2><a name="KeepAlive" id="KeepAlive">KeepAlive</a> <a name="keepalive" id="keepalive">Directive</a></h2>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enables HTTP persistent connections</td></tr>
83a8dc5a596a8a1b9d14f063268287d123b9ed7ewrowe<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>KeepAlive On|Off</code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>KeepAlive On</code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard <p>The Keep-Alive extension to HTTP/1.0 and the persistent
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard connection feature of HTTP/1.1 provide long-lived HTTP sessions
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard which allow multiple requests to be sent over the same TCP
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard connection. In some cases this has been shown to result in an
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard almost 50% speedup in latency times for HTML documents with
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard many images. To enable Keep-Alive connections, set
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard <p>For HTTP/1.0 clients, Keep-Alive connections will only be
66e89b91046a4d0998bcb11c8aeb39ac444ed2dfjerenkrantz used if they are specifically requested by a client. In
66e89b91046a4d0998bcb11c8aeb39ac444ed2dfjerenkrantz addition, a Keep-Alive connection with an HTTP/1.0 client can
66e89b91046a4d0998bcb11c8aeb39ac444ed2dfjerenkrantz only be used when the length of the content is known in
30b4a330a5f651eb5198fa93dbb9f3d3594564c9stoddard advance. This implies that dynamic content such as CGI output,
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb SSI pages, and server-generated directory listings will
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb generally not use Keep-Alive connections to HTTP/1.0 clients.
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb For HTTP/1.1 clients, persistent connections are the default
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb unless otherwise specified. If the client requests it, chunked
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb encoding will be used in order to send content of unknown
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb length over persistent connections.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb <p>When a client uses a Keep-Alive connection it will be counted
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb as a single "request" for the <code class="directive"><a href="/mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code> directive, regardless
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb of how many requests are sent using the connection.</p>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<li><code class="directive"><a href="#maxkeepaliverequests">MaxKeepAliveRequests</a></code></li>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
d4abb06ac220bb280ae996b6d21bbd257db51bb1jerenkrantz<div class="directive-section"><h2><a name="KeepAliveTimeout" id="KeepAliveTimeout">KeepAliveTimeout</a> <a name="keepalivetimeout" id="keepalivetimeout">Directive</a></h2>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Amount of time the server will wait for subsequent
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>KeepAliveTimeout <var>num</var>[ms]</code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>KeepAliveTimeout 5</code></td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Core</td></tr>
b38846b15c8891c6dec44dcc4f96ca40721bf663rbb<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>core</td></tr>
4f9c22c4f27571d54197be9674e1fc0d528192aestriker<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Specifying a value in milliseconds is available in
defined virtual host (the default host) in a set of <code class="directive"><a href="#namevirtualhost">NameVirtualHost</a></code> will be used.
<div class="directive-section"><h2><a name="Limit" id="Limit"><Limit></a> <a name="limit" id="limit">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Restrict enclosed access controls to only certain HTTP
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><Limit <var>method</var> [<var>method</var>] ... > ...
restrictions that are enclosed in the <code class="directive"><Limit></code> bracket <strong>will have no
<div class="warning">A <code class="directive"><a href="#limitexcept"><LimitExcept></a></code> section should always be
section when restricting access, since a <code class="directive"><a href="#limitexcept"><LimitExcept></a></code> section provides protection
<code class="directive"><Limit></code> or <code class="directive"><a href="#limitexcept"><LimitExcept></a></code> directives must
the <code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code> directive,
note that the first <code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code>
<code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code> directives.</div>
<div class="directive-section"><h2><a name="LimitExcept" id="LimitExcept"><LimitExcept></a> <a name="limitexcept" id="limitexcept">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Restrict access controls to all HTTP methods
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><LimitExcept <var>method</var> [<var>method</var>] ... > ...
i.e., it is the opposite of a <code class="directive"><a href="#limit"><Limit></a></code> section and can be used to control
documentation for <code class="directive"><a href="#limit"><Limit></a></code> for more details.</p>
<div class="directive-section"><h2><a name="LimitInternalRecursion" id="LimitInternalRecursion">LimitInternalRecursion</a> <a name="limitinternalrecursion" id="limitinternalrecursion">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determine maximum number of internal redirects and nested
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitInternalRecursion <var>number</var> [<var>number</var>]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitInternalRecursion 10</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.0.47 and later</td></tr>
<p>An internal redirect happens, for example, when using the <code class="directive"><a href="/mod/mod_actions.html#action">Action</a></code> directive, which internally
For example, <code class="module"><a href="/mod/mod_dir.html">mod_dir</a></code> uses subrequests to look for the
files listed in the <code class="directive"><a href="/mod/mod_dir.html#directoryindex">DirectoryIndex</a></code>
<div class="directive-section"><h2><a name="LimitRequestBody" id="LimitRequestBody">LimitRequestBody</a> <a name="limitrequestbody" id="limitrequestbody">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Restricts the total size of the HTTP request body sent
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitRequestBody <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitRequestBody 0</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
proxy requests, see the <code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code> documentation.</p>
<div class="directive-section"><h2><a name="LimitRequestFields" id="LimitRequestFields">LimitRequestFields</a> <a name="limitrequestfields" id="limitrequestfields">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the number of HTTP request header fields that
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitRequestFields <var>number</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitRequestFields 100</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<div class="directive-section"><h2><a name="LimitRequestFieldSize" id="LimitRequestFieldSize">LimitRequestFieldSize</a> <a name="limitrequestfieldsize" id="limitrequestfieldsize">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the size of the HTTP request header allowed from the
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitRequestFieldSize <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitRequestFieldSize 8190</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<div class="directive-section"><h2><a name="LimitRequestLine" id="LimitRequestLine">LimitRequestLine</a> <a name="limitrequestline" id="limitrequestline">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limit the size of the HTTP request line that will be accepted
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitRequestLine <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitRequestLine 8190</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<div class="directive-section"><h2><a name="LimitXMLRequestBody" id="LimitXMLRequestBody">LimitXMLRequestBody</a> <a name="limitxmlrequestbody" id="limitxmlrequestbody">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the size of an XML-based request body</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LimitXMLRequestBody <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LimitXMLRequestBody 1000000</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="Location" id="Location"><Location></a> <a name="location" id="location">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Applies the enclosed directives only to matching
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<code></Location></code> directive. <code class="directive"><Location></code> sections are processed in the
order they appear in the configuration file, after the <code class="directive"><a href="#directory"><Directory></a></code> sections and
<code>.htaccess</code> files are read, and after the <code class="directive"><a href="#files"><Files></a></code> sections.</p>
content that lives in the filesystem, use <code class="directive"><a href="#directory"><Directory></a></code> and <code class="directive"><a href="#files"><Files></a></code>. An exception is
or <code>/special/data</code>. The directive <code class="directive"><a href="#locationmatch"><LocationMatch></a></code> behaves
identical to the regex version of <code class="directive"><Location></code>, and is preferred, for the
directive and the regex version of <code class="directive"><Location></code> require you to explicitly specify multiple
//abc</code>. The (non-regex) <code class="directive"><Location></code> directive behaves similarly when used for
proxy requests. But when (non-regex) <code class="directive"><Location></code> is used for non-proxy requests it will
<div class="directive-section"><h2><a name="LocationMatch" id="LocationMatch"><LocationMatch></a> <a name="locationmatch" id="locationmatch">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Applies the enclosed directives only to regular-expression
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
it takes a <a class="glossarylink" href="/glossary.html#regex" title="see glossary">regular expression</a>
<div class="directive-section"><h2><a name="LogLevel" id="LogLevel">LogLevel</a> <a name="loglevel" id="loglevel">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls the verbosity of the ErrorLog</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LogLevel [<var>module</var>:]<var>level</var>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LogLevel warn</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Per-module and per-directory configuration is available in
messages recorded in the error logs (see <code class="directive"><a href="#errorlog">ErrorLog</a></code> directive). The following
<div class="directive-section"><h2><a name="MaxKeepAliveRequests" id="MaxKeepAliveRequests">MaxKeepAliveRequests</a> <a name="maxkeepaliverequests" id="maxkeepaliverequests">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Number of requests allowed on a persistent
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MaxKeepAliveRequests <var>number</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MaxKeepAliveRequests 100</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<div class="directive-section"><h2><a name="Mutex" id="Mutex">Mutex</a> <a name="mutex" id="mutex">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures mutex mechanism and lock file directory for all
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Mutex <var>mechanism</var> [default|<var>mutex-name</var>] ... [OmitPID]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Mutex default</code></td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.4 and later</td></tr>
by <a class="glossarylink" href="/glossary.html#apr" title="see glossary">APR</a> has a functional or performance
<a class="glossarylink" href="/glossary.html#apr" title="see glossary">APR</a>. The default locking implementation can
be displayed by running <code class="program"><a href="/programs/httpd.html">httpd</a></code> with the
all CGIs, unless you use something like <code class="program"><a href="/programs/suexec.html">suexec</a></code>
underlying platform and <a class="glossarylink" href="/glossary.html#apr" title="see glossary">APR</a> support it. Mechanisms
<td><code class="module"><a href="/mod/prefork.html">prefork</a></code> and <code class="module"><a href="/mod/worker.html">worker</a></code> MPMs</td>
<div class="directive-section"><h2><a name="NameVirtualHost" id="NameVirtualHost">NameVirtualHost</a> <a name="namevirtualhost" id="namevirtualhost">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Designates an IP address for name-virtual
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>NameVirtualHost <var>addr</var>[:<var>port</var>]</code></td></tr>
<div class="directive-section"><h2><a name="Options" id="Options">Options</a> <a name="options" id="options">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures what features are available in a particular
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Options All</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
change the pathname used to match against <code class="directive"><a href="#directory"><Directory></a></code> sections.</p>
Server-side includes provided by <code class="module"><a href="/mod/mod_include.html">mod_include</a></code>
<code class="module"><a href="/mod/mod_autoindex.html">mod_autoindex</a></code> will return a formatted listing
anywhere other than <code class="directive"><a href="#directory"><Directory></a></code>, as <code class="module"><a href="/mod/mod_negotiation.html">mod_negotiation</a></code>
others are ignored; the options are not merged. (See <a href="/sections.html#mergin">how sections are merged</a>.)
<div class="directive-section"><h2><a name="Protocol" id="Protocol">Protocol</a> <a name="protocol" id="protocol">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Protocol for a listening socket</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Protocol <var>protocol</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1.5 and later.
<p>You only need to set the protocol if you are running on non-standard ports, otherwise <code>http</code> is assumed for port 80 and <code>https</code> for port 443.</p>
<p>For example, if you are running <code>https</code> on a non-standard port, specify the protocol explicitly:</p>
<p>You can also specify the protocol using the <code class="directive"><a href="/mod/mpm_common.html#listen">Listen</a></code> directive.</p>
<div class="directive-section"><h2><a name="RLimitCPU" id="RLimitCPU">RLimitCPU</a> <a name="rlimitcpu" id="rlimitcpu">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the CPU consumption of processes launched
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RLimitCPU <var>seconds</var>|max [<var>seconds</var>|max]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Unset; uses operating system defaults</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="RLimitMEM" id="RLimitMEM">RLimitMEM</a> <a name="rlimitmem" id="rlimitmem">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the memory consumption of processes launched
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RLimitMEM <var>bytes</var>|max [<var>bytes</var>|max]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Unset; uses operating system defaults</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="RLimitNPROC" id="RLimitNPROC">RLimitNPROC</a> <a name="rlimitnproc" id="rlimitnproc">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Limits the number of processes that can be launched by
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RLimitNPROC <var>number</var>|max [<var>number</var>|max]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Unset; uses operating system defaults</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="ScriptInterpreterSource" id="ScriptInterpreterSource">ScriptInterpreterSource</a> <a name="scriptinterpretersource" id="scriptinterpretersource">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Technique for locating the interpreter for CGI
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptInterpreterSource Registry|Registry-Strict|Script</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ScriptInterpreterSource Script</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
Registry</code> with <code class="directive"><a href="/mod/mod_alias.html#scriptalias">ScriptAlias</a></code>'ed directories, because
<div class="directive-section"><h2><a name="SeeRequestTail" id="SeeRequestTail">SeeRequestTail</a> <a name="seerequesttail" id="seerequesttail">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determine if mod_status displays the first 63 characters
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SeeRequestTail On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SeeRequestTail Off</code></td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache httpd 2.2.7 and later.</td></tr>
<p>If Apache httpd is handling <code>GET /disk1/storage/apache/htdocs/images/imagestore1/food/apples.jpg HTTP/1.1</code> mod_status displays as follows:
<div class="directive-section"><h2><a name="ServerAdmin" id="ServerAdmin">ServerAdmin</a> <a name="serveradmin" id="serveradmin">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Email address that the server includes in error
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerAdmin <var>email-address</var>|<var>URL</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<div class="directive-section"><h2><a name="ServerAlias" id="ServerAlias">ServerAlias</a> <a name="serveralias" id="serveralias">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Alternate names for a host used when matching requests
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerAlias <var>hostname</var> [<var>hostname</var>] ...</code></td></tr>
alternate names for a host, for use with <a href="/vhosts/name-based.html">name-based virtual hosts</a>. The
<div class="directive-section"><h2><a name="ServerName" id="ServerName">ServerName</a> <a name="servername" id="servername">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Hostname and port that the server uses to identify
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerName [<var>scheme</var>://]<var>fully-qualified-domain-name</var>[:<var>port</var>]</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
identify a virtual host, when using <a href="/vhosts/name-based.html">name-based virtual hosts</a>.</p>
ServerName www.example.com:80
<code class="directive"><a href="#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code> directives for
settings which determine whether self-referential URLs (e.g., by the
httpd: Could not reliably determine the server's fully qualified domain name, using rocinante.local for ServerName
<li><code class="directive"><a href="#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code></li>
<div class="directive-section"><h2><a name="ServerPath" id="ServerPath">ServerPath</a> <a name="serverpath" id="serverpath">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Legacy URL pathname for a name-based virtual host that
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerPath <var>URL-path</var></code></td></tr>
<div class="directive-section"><h2><a name="ServerRoot" id="ServerRoot">ServerRoot</a> <a name="serverroot" id="serverroot">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Base directory for the server installation</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerRoot <var>directory-path</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ServerRoot /usr/local/apache</code></td></tr>
paths in other configuration directives (such as <code class="directive"><a href="#include">Include</a></code> or <code class="directive"><a href="/mod/mod_so.html#loadmodule">LoadModule</a></code>, for example) are taken as
<div class="directive-section"><h2><a name="ServerSignature" id="ServerSignature">ServerSignature</a> <a name="serversignature" id="serversignature">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures the footer on server-generated documents</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerSignature On|Off|EMail</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ServerSignature Off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
documents (error messages, <code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code> ftp directory
listings, <code class="module"><a href="/mod/mod_info.html">mod_info</a></code> output, ...). The reason why you
server version number and <code class="directive"><a href="#servername">ServerName</a></code> of the serving virtual host,
"mailto:" reference to the <code class="directive"><a href="#serveradmin">ServerAdmin</a></code> of the referenced
presented are controlled by the <code class="directive"><a href="#servertokens">ServerTokens</a></code> directive.</p>
<div class="directive-section"><h2><a name="ServerTokens" id="ServerTokens">ServerTokens</a> <a name="servertokens" id="servertokens">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures the <code>Server</code> HTTP response
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ServerTokens Major|Minor|Min[imal]|Prod[uctOnly]|OS|Full</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ServerTokens Full</code></td></tr>
information presented by the <code class="directive"><a href="#serversignature">ServerSignature</a></code> directive.</p>
<div class="directive-section"><h2><a name="SetHandler" id="SetHandler">SetHandler</a> <a name="sethandler" id="sethandler">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Forces all matching files to be processed by a
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetHandler <var>handler-name</var>|None</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Moved into the core in Apache httpd 2.0</td></tr>
<div class="directive-section"><h2><a name="SetInputFilter" id="SetInputFilter">SetInputFilter</a> <a name="setinputfilter" id="setinputfilter">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the filters that will process client requests and POST
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetInputFilter <var>filter</var>[;<var>filter</var>...]</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="SetOutputFilter" id="SetOutputFilter">SetOutputFilter</a> <a name="setoutputfilter" id="setoutputfilter">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the filters that will process responses from the
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetOutputFilter <var>filter</var>[;<var>filter</var>...]</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<div class="directive-section"><h2><a name="TimeOut" id="TimeOut">TimeOut</a> <a name="timeout" id="timeout">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Amount of time the server will wait for
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>TimeOut <var>seconds</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>TimeOut 300</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<li>In <code class="module"><a href="/mod/mod_cgi.html">mod_cgi</a></code>, the length of time to wait for
<li>In <code class="module"><a href="/mod/mod_ext_filter.html">mod_ext_filter</a></code>, the length of time to
<li>In <code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code>, the default timeout value if
<div class="directive-section"><h2><a name="TraceEnable" id="TraceEnable">TraceEnable</a> <a name="traceenable" id="traceenable">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines the behaviour on <code>TRACE</code> requests</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>TraceEnable <var>[on|off|extended]</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>TraceEnable on</code></td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 1.3.34, 2.0.55 and later</td></tr>
the core server and <code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code>. The default
<code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code> to return a <code>405</code> (Method not
<div class="directive-section"><h2><a name="UnDefine" id="UnDefine">UnDefine</a> <a name="undefine" id="undefine">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Undefine the existence of a variable</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UnDefine <var>parameter-name</var></code></td></tr>
of passing a <code>-D</code> argument to <code class="program"><a href="/programs/httpd.html">httpd</a></code>.</p>
<p>This directive can be used to toggle the use of <code class="directive"><a href="#ifdefine"><IfDefine></a></code> sections without needing to alter
<div class="directive-section"><h2><a name="UseCanonicalName" id="UseCanonicalName">UseCanonicalName</a> <a name="usecanonicalname" id="usecanonicalname">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures how the server determines its own name and
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UseCanonicalName On|Off|DNS</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>UseCanonicalName Off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
for <code>www.example.com</code> -- see <a href="http://httpd.apache.org/docs/misc/FAQ.html#prompted-twice">the
<li><code class="directive"><a href="#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code></li>
<div class="directive-section"><h2><a name="UseCanonicalPhysicalPort" id="UseCanonicalPhysicalPort">UseCanonicalPhysicalPort</a> <a name="usecanonicalphysicalport" id="usecanonicalphysicalport">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures how the server determines its own name and
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UseCanonicalPhysicalPort On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>UseCanonicalPhysicalPort Off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
<div class="directive-section"><h2><a name="VirtualHost" id="VirtualHost"><VirtualHost></a> <a name="virtualhost" id="virtualhost">Directive</a></h2>
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Contains directives that apply only to a specific
specified inside each <code class="directive"><VirtualHost></code> block. If it is absent, the
<p><span>Available Languages: </span><a href="/de/mod/core.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
<p class="apache">Copyright 2010 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="/mod/">Modules</a> | <a href="/mod/directives.html">Directives</a> | <a href="/faq/">FAQ</a> | <a href="/glossary.html">Glossary</a> | <a href="/sitemap.html">Sitemap</a></p></div>