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--><title>Server-Wide Configuration - Apache HTTP Server</title><link href="/style/manual.css" type="text/css" rel="stylesheet"></head><body><blockquote><div align="center"><img src="/images/sub.gif" alt="[APACHE DOCUMENTATION]"><h3>Apache HTTP Server Version 2.0</h3></div><h1 align="center">Server-Wide Configuration</h1>
<p>This document explains some of the directives provided by
the basic operations of the server.</p>
<ul><li><a href="#identification">Server Identification</a></li><li><a href="#locations">File Locations</a></li><li><a href="#resource">Limiting Resource Usage</a></li></ul><hr><h2><a name="identification">Server Identification</a></h2>
<table border="1"><tr><td valign="top"><strong>Related Modules</strong><br><br></td><td valign="top"><strong>Related Directives</strong><br><br><a href="/mod/core.html#servername" class="directive"><code class="directive">ServerName</code></a><br><a href="/mod/core.html#serveradmin" class="directive"><code class="directive">ServerAdmin</code></a><br><a href="/mod/core.html#serversignature" class="directive"><code class="directive">ServerSignature</code></a><br><a href="/mod/core.html#servertokens" class="directive"><code class="directive">ServerTokens</code></a><br><a href="/mod/core.html#usecanonicalname" class="directive"><code class="directive">UseCanonicalName</code></a><br></td></tr></table>
<p>The <a href="/mod/core.html#serveradmin" class="directive"><code class="directive">ServerAdmin</code></a> and
<a href="/mod/core.html#servertokens" class="directive"><code class="directive">ServerTokens</code></a> directives
control what information about the server will be presented
in server-generated documents such as error messages. The
<a href="/mod/core.html#servertokens" class="directive"><code class="directive">ServerTokens</code></a> directive
sets the value of the Server HTTP response header field.</p>
<p>The <a href="/mod/core.html#servername" class="directive"><code class="directive">ServerName</code></a> and
<a href="/mod/core.html#usecanonicalname" class="directive"><code class="directive">UseCanonicalName</code></a>
directives are used by the server to determine how to construct
self-referential URLs. For example, when a client requests a
directory, but does not include the trailing slash in the
directory name, Apache must redirect the client to the full
name including the trailing slash so that the client will
correctly resolve relative references in the document.</p>
<h2><a name="locations">File Locations</a></h2>
<table border="1"><tr><td valign="top"><strong>Related Modules</strong><br><br></td><td valign="top"><strong>Related Directives</strong><br><br><a href="/mod/mpm_common.html#coredumpdirectory" class="directive"><code class="directive">CoreDumpDirectory</code></a><br><a href="/mod/core.html#documentroot" class="directive"><code class="directive">DocumentRoot</code></a><br><a href="/mod/core.html#errorlog" class="directive"><code class="directive">ErrorLog</code></a><br><a href="/mod/mpm_common.html#lockfile" class="directive"><code class="directive">LockFile</code></a><br><a href="/mod/mpm_common.html#pidfile" class="directive"><code class="directive">PidFile</code></a><br><a href="/mod/mpm_common.html#scoreboardfile" class="directive"><code class="directive">ScoreBoardFile</code></a><br><a href="/mod/core.html#serverroot" class="directive"><code class="directive">ServerRoot</code></a><br></td></tr></table>
<p>These directives control the locations of the various files
that Apache needs for proper operation. When the pathname used
does not begin with a slash (/), the files are located relative
to the <a href="/mod/core.html#serverroot" class="directive"><code class="directive">ServerRoot</code></a>. Be careful
about locating files in paths which are writable by non-root users.
documentation for more details.</p>
<h2><a name="resource">Limiting Resource Usage</a></h2>
<table border="1"><tr><td valign="top"><strong>Related Modules</strong><br><br></td><td valign="top"><strong>Related Directives</strong><br><br><a href="/mod/core.html#limitrequestbody" class="directive"><code class="directive">LimitRequestBody</code></a><br><a href="/mod/core.html#limitrequestfields" class="directive"><code class="directive">LimitRequestFields</code></a><br><a href="/mod/core.html#limitrequestfieldsize" class="directive"><code class="directive">LimitRequestFieldsize</code></a><br><a href="/mod/core.html#limitrequestline" class="directive"><code class="directive">LimitRequestLine</code></a><br><a href="/mod/core.html#rlimitcpu" class="directive"><code class="directive">RLimitCPU</code></a><br><a href="/mod/core.html#rlimitmem" class="directive"><code class="directive">RLimitMEM</code></a><br><a href="/mod/core.html#rlimitnproc" class="directive"><code class="directive">RLimitNPROC</code></a><br><a href="/mod/mpm_netware.html#threadstacksize" class="directive"><code class="directive">ThreadStackSize</code></a><br></td></tr></table>
<p>The <code class="directive">LimitRequest</code>*
directives are used to place limits on the amount of resources
Apache will use in reading requests from clients. By limiting
these values, some kinds of denial of service attacks can be
mitigated.</p>
<p>The <code class="directive">RLimit</code>* directives
are used to limit the amount of resources which can be used by
processes forked off from the Apache children. In particular,
this will control resources used by CGI scripts and SSI exec
commands.</p>
<p>The <a href="/mod/mpm_netware.html#threadstacksize" class="directive"><code class="directive">ThreadStackSize</code></a> directive
is used only on Netware to control the stack size.</p>
