<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> <!-- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> <title>Server-Wide Configuration - Apache HTTP Server Version 2.4</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 rel="stylesheet" type="text/css" href="./style/css/prettify.css" /> <script src="./style/scripts/prettify.min.js" type="text/javascript"> </script> <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="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="./images/feather.png" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div> <div id="path"> <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 2.4</a></div><div id="page-content"><div id="preamble"><h1>Server-Wide Configuration</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="./en/server-wide.html" title="English"> en </a> | <a href="./fr/server-wide.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | <a href="./ja/server-wide.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | <a href="./ko/server-wide.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | <a href="./tr/server-wide.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> </div> <p>This document explains some of the directives provided by the <code class="module"><a href="./mod/core.html">core</a></code> server which are used to configure the basic operations of the server.</p> </div> <div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><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> <li><img alt="" src="./images/down.gif" /> <a href="#implementation">Implementation Choices</a></li> </ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</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> <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> <p>The <code class="directive"><a href="./mod/core.html#serveradmin">ServerAdmin</a></code> and <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directives control what information about the server will be presented in server-generated documents such as error messages. The <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directive sets the value of the Server HTTP response header field.</p> <p>The <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code>, <code class="directive"><a href="./mod/core.html#usecanonicalname">UseCanonicalName</a></code> and <code class="directive"><a href="./mod/core.html#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code> 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, httpd 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> </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> <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> <p>These directives control the locations of the various files that httpd needs for proper operation. When the pathname used does not begin with a slash (/), the files are located relative to the <code class="directive"><a href="./mod/core.html#serverroot">ServerRoot</a></code>. Be careful about locating files in paths which are writable by non-root users. See the <a href="misc/security_tips.html#serverroot">security tips</a> documentation for more details.</p> </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> <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> <p>The <code class="directive">LimitRequest</code>* directives are used to place limits on the amount of resources httpd 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 httpd children. In particular, this will control resources used by CGI scripts and SSI exec commands.</p> <p>The <code class="directive"><a href="./mod/mpm_common.html#threadstacksize">ThreadStackSize</a></code> directive is used with some platforms to control the stack size.</p> </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> <div class="section"> <h2><a name="implementation" id="implementation">Implementation Choices</a></h2> <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> <p>The <code class="directive">Mutex</code> directive can be used to change the underlying implementation used for mutexes, in order to relieve functional or performance problems with <a class="glossarylink" href="./glossary.html#apr" title="see glossary">APR</a>'s default choice.</p> </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="./en/server-wide.html" title="English"> en </a> | <a href="./fr/server-wide.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | <a href="./ja/server-wide.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | <a href="./ko/server-wide.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | <a href="./tr/server-wide.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> </div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. 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