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   7       --><title>Server-Wide Configuration - Apache HTTP Server</title><link href="./style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /><link href="./style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /><link href="./style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link href="./images/favicon.ico" rel="shortcut icon" /></head><body id="manual-page"><div id="page-header"><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><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="./images/feather.gif" /></div><div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="./images/left.gif" /></a></div><div id="path"><a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs-project/">Documentation</a> &gt; <a href="./">Version 2.0</a></div><div id="page-content"><div id="preamble"><h1>Server-Wide Configuration</h1>
   8 <p>This document explains some of the directives provided by
   9 the <code class="module"><a href="./mod/core.html">core</a></code> server which are used to configure
  10 the basic operations of the server.</p>
  11 </div><div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#identification">Server Identification</a></li><li><img alt="" src="./images/down.gif" /> <a href="#locations">File Locations</a></li><li><img alt="" src="./images/down.gif" /> <a href="#resource">Limiting Resource Usage</a></li></ul></div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div><div class="section"><h2><a name="identification" id="identification">Server Identification</a></h2>
  12
  13
  14     <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></ul></td></tr></table>
  15
  16     <p>The <code class="directive"><a href="./mod/core.html#serveradmin">ServerAdmin</a></code> and
  17     <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directives
  18     control what information about the server will be presented
  19     in server-generated documents such as error messages. The
  20     <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directive
  21     sets the value of the Server HTTP response header field.</p>
  22
  23     <p>The <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code> and
  24     <code class="directive"><a href="./mod/core.html#usecanonicalname">UseCanonicalName</a></code>
  25     directives are used by the server to determine how to construct
  26     self-referential URLs. For example, when a client requests a
  27     directory, but does not include the trailing slash in the
  28     directory name, Apache must redirect the client to the full
  29     name including the trailing slash so that the client will
  30     correctly resolve relative references in the document.</p>
  31   </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div><div class="section"><h2><a name="locations" id="locations">File Locations</a></h2>
  32
  33
  34     <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/mpm_common.html#lockfile">LockFile</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>
  35
  36     <p>These directives control the locations of the various files
  37     that Apache needs for proper operation. When the pathname used
  38     does not begin with a slash (/), the files are located relative
  39     to the <code class="directive"><a href="./mod/core.html#serverroot">ServerRoot</a></code>. Be careful
  40     about locating files in paths which are writable by non-root users.
  41     See the <a href="misc/security_tips.html#serverroot">security tips</a>
  42     documentation for more details.</p>
  43   </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div><div class="section"><h2><a name="resource" id="resource">Limiting Resource Usage</a></h2>
  44
  45
  46     <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_netware.html#threadstacksize">ThreadStackSize</a></code></li></ul></td></tr></table>
  47
  48     <p>The <code class="directive">LimitRequest</code>*
  49     directives are used to place limits on the amount of resources
  50     Apache will use in reading requests from clients. By limiting
  51     these values, some kinds of denial of service attacks can be
  52     mitigated.</p>
  53
  54     <p>The <code class="directive">RLimit</code>* directives
  55     are used to limit the amount of resources which can be used by
  56     processes forked off from the Apache children. In particular,
  57     this will control resources used by CGI scripts and SSI exec
  58     commands.</p>
  59
  60     <p>The <code class="directive"><a href="./mod/mpm_netware.html#threadstacksize">ThreadStackSize</a></code> directive
  61     is used only on Netware to control the stack size.</p>
  62   </div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</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></body></html>