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5a58787efeb02a1c3f06569d019ad81fd2efa06end<title>Server-Wide Configuration - Apache HTTP Server</title>
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5a58787efeb02a1c3f06569d019ad81fd2efa06end<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>
52fff662005b1866a3ff09bb6c902800c5cc6dedjerenkrantz<p class="apache">Apache HTTP Server Version 2.3</p>
5a58787efeb02a1c3f06569d019ad81fd2efa06end<div class="up"><a href="./"><img title="<-" alt="<-" src="/images/left.gif" /></a></div>
4b5981e276e93df97c34e4da05ca5cf8bbd937dand<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></div><div id="page-content"><div id="preamble"><h1>Server-Wide Configuration</h1>
ad74a0524a06bfe11b7de9e3b4ce7233ab3bd3f7nd<p><span>Available Languages: </span><a href="/en/server-wide.html" title="English"> en </a> |
d05d0eb4ae6d2a5e513fc3bf2555ce33da416634nd<a href="/fr/server-wide.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a> |
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15107611640cec4e666dd7e2e1dee15c270e9e98rbowen<p>This document explains some of the directives provided by
15107611640cec4e666dd7e2e1dee15c270e9e98rbowenthe <code class="module"><a href="/mod/core.html">core</a></code> server which are used to configure
15107611640cec4e666dd7e2e1dee15c270e9e98rbowenthe basic operations of the server.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<div id="quickview"><ul id="toc"><li><img alt="" src="/images/down.gif" /> <a href="#identification">Server Identification</a></li>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<li><img alt="" src="/images/down.gif" /> <a href="#locations">File Locations</a></li>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<li><img alt="" src="/images/down.gif" /> <a href="#resource">Limiting Resource Usage</a></li>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<li><img alt="" src="/images/down.gif" /> <a href="#implementation">Implementation Choices</a></li>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<h2><a name="identification" id="identification">Server Identification</a></h2>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="/mod/core.html#servername">ServerName</a></code></li><li><code class="directive"><a href="/mod/core.html#serveradmin">ServerAdmin</a></code></li><li><code class="directive"><a href="/mod/core.html#serversignature">ServerSignature</a></code></li><li><code class="directive"><a href="/mod/core.html#servertokens">ServerTokens</a></code></li><li><code class="directive"><a href="/mod/core.html#usecanonicalname">UseCanonicalName</a></code></li><li><code class="directive"><a href="/mod/core.html#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code></li></ul></td></tr></table>
5a58787efeb02a1c3f06569d019ad81fd2efa06end <p>The <code class="directive"><a href="/mod/core.html#serveradmin">ServerAdmin</a></code> and
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <code class="directive"><a href="/mod/core.html#servertokens">ServerTokens</a></code> directives
5a58787efeb02a1c3f06569d019ad81fd2efa06end control what information about the server will be presented
5a58787efeb02a1c3f06569d019ad81fd2efa06end in server-generated documents such as error messages. The
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <code class="directive"><a href="/mod/core.html#servertokens">ServerTokens</a></code> directive
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess sets the value of the Server HTTP response header field.</p>
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess <p>The <code class="directive"><a href="/mod/core.html#servername">ServerName</a></code>,
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <code class="directive"><a href="/mod/core.html#usecanonicalname">UseCanonicalName</a></code> and
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <code class="directive"><a href="/mod/core.html#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier directives are used by the server to determine how to construct
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess self-referential URLs. For example, when a client requests a
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess directory, but does not include the trailing slash in the
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess directory name, Apache must redirect the client to the full
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess name including the trailing slash so that the client will
60a4b2c422dcbb08a554fb193105c08da592718bpoirier correctly resolve relative references in the document.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier </div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<h2><a name="locations" id="locations">File Locations</a></h2>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="/mod/mpm_common.html#coredumpdirectory">CoreDumpDirectory</a></code></li><li><code class="directive"><a href="/mod/core.html#documentroot">DocumentRoot</a></code></li><li><code class="directive"><a href="/mod/core.html#errorlog">ErrorLog</a></code></li><li><code class="directive"><a href="/mod/core.html#mutex">Mutex</a></code></li><li><code class="directive"><a href="/mod/mpm_common.html#pidfile">PidFile</a></code></li><li><code class="directive"><a href="/mod/mpm_common.html#scoreboardfile">ScoreBoardFile</a></code></li><li><code class="directive"><a href="/mod/core.html#serverroot">ServerRoot</a></code></li></ul></td></tr></table>
6e14faf37935e36804b8bad802bc9dd58f3cf65dsf <p>These directives control the locations of the various files
60a4b2c422dcbb08a554fb193105c08da592718bpoirier that Apache needs for proper operation. When the pathname used
60a4b2c422dcbb08a554fb193105c08da592718bpoirier does not begin with a slash (/), the files are located relative
6e14faf37935e36804b8bad802bc9dd58f3cf65dsf to the <code class="directive"><a href="/mod/core.html#serverroot">ServerRoot</a></code>. Be careful
60a4b2c422dcbb08a554fb193105c08da592718bpoirier about locating files in paths which are writable by non-root users.
60a4b2c422dcbb08a554fb193105c08da592718bpoirier See the <a href="misc/security_tips.html#serverroot">security tips</a>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier documentation for more details.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier </div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<h2><a name="resource" id="resource">Limiting Resource Usage</a></h2>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="/mod/core.html#limitrequestbody">LimitRequestBody</a></code></li><li><code class="directive"><a href="/mod/core.html#limitrequestfields">LimitRequestFields</a></code></li><li><code class="directive"><a href="/mod/core.html#limitrequestfieldsize">LimitRequestFieldsize</a></code></li><li><code class="directive"><a href="/mod/core.html#limitrequestline">LimitRequestLine</a></code></li><li><code class="directive"><a href="/mod/core.html#rlimitcpu">RLimitCPU</a></code></li><li><code class="directive"><a href="/mod/core.html#rlimitmem">RLimitMEM</a></code></li><li><code class="directive"><a href="/mod/core.html#rlimitnproc">RLimitNPROC</a></code></li><li><code class="directive"><a href="/mod/mpm_common.html#threadstacksize">ThreadStackSize</a></code></li></ul></td></tr></table>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier directives are used to place limits on the amount of resources
60a4b2c422dcbb08a554fb193105c08da592718bpoirier Apache will use in reading requests from clients. By limiting
1696993fbee984b093ae8b823e3ea3fa80eae486covener these values, some kinds of denial of service attacks can be
60a4b2c422dcbb08a554fb193105c08da592718bpoirier mitigated.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <p>The <code class="directive">RLimit</code>* directives
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess are used to limit the amount of resources which can be used by
fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess processes forked off from the Apache children. In particular,
6e14faf37935e36804b8bad802bc9dd58f3cf65dsf this will control resources used by CGI scripts and SSI exec
6e14faf37935e36804b8bad802bc9dd58f3cf65dsf commands.</p>
6e14faf37935e36804b8bad802bc9dd58f3cf65dsf <p>The <code class="directive"><a href="/mod/mpm_common.html#threadstacksize">ThreadStackSize</a></code>
1696993fbee984b093ae8b823e3ea3fa80eae486covener directive is used with some platforms to control the stack size.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier </div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<h2><a name="implementation" id="implementation">Implementation Choices</a></h2>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="/mod/core.html#mutex">Mutex</a></code></li></ul></td></tr></table>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier <p>The <code class="directive">Mutex</code> directive can be used to change
60a4b2c422dcbb08a554fb193105c08da592718bpoirier the underlying implementation used for mutexes, in order to relieve
60a4b2c422dcbb08a554fb193105c08da592718bpoirier functional or performance problems with <a class="glossarylink" href="/glossary.html#apr" title="see glossary">APR</a>'s
60a4b2c422dcbb08a554fb193105c08da592718bpoirier default choice.</p>
60a4b2c422dcbb08a554fb193105c08da592718bpoirier<p><span>Available Languages: </span><a href="/en/server-wide.html" title="English"> en </a> |
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fefb8b844b6286bfc41bb2e0c4cc003b8e7d4ff2kess<p class="apache">Copyright 2009 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>
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