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10 <title>Server-Wide Configuration - Apache HTTP Server Version 2.5</title>
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20 <p class="apache">Apache HTTP Server Version 2.5</p>
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24 <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 2.5</a></div><div id="page-content"><div id="preamble"><h1>Server-Wide Configuration</h1>
26 <p><span>Available Languages: </span><a href="./en/server-wide.html" title="English"> en </a> |
27 <a href="./fr/server-wide.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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33 <p>This document explains some of the directives provided by
34 the <code class="module"><a href="./mod/core.html">core</a></code> server which are used to configure
35 the basic operations of the server.</p>
37 <div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#identification">Server Identification</a></li>
38 <li><img alt="" src="./images/down.gif" /> <a href="#locations">File Locations</a></li>
39 <li><img alt="" src="./images/down.gif" /> <a href="#resource">Limiting Resource Usage</a></li>
40 <li><img alt="" src="./images/down.gif" /> <a href="#implementation">Implementation Choices</a></li>
41 </ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
42 <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
44 <h2><a name="identification" id="identification">Server Identification</a></h2>
47 <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>
49 <p>The <code class="directive"><a href="./mod/core.html#serveradmin">ServerAdmin</a></code> and
50 <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directives
51 control what information about the server will be presented
52 in server-generated documents such as error messages. The
53 <code class="directive"><a href="./mod/core.html#servertokens">ServerTokens</a></code> directive
54 sets the value of the Server HTTP response header field.</p>
56 <p>The <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code>,
57 <code class="directive"><a href="./mod/core.html#usecanonicalname">UseCanonicalName</a></code> and
58 <code class="directive"><a href="./mod/core.html#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code>
59 directives are used by the server to determine how to construct
60 self-referential URLs. For example, when a client requests a
61 directory, but does not include the trailing slash in the
62 directory name, httpd must redirect the client to the full
63 name including the trailing slash so that the client will
64 correctly resolve relative references in the document.</p>
65 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
67 <h2><a name="locations" id="locations">File Locations</a></h2>
70 <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>
72 <p>These directives control the locations of the various files
73 that httpd needs for proper operation. When the pathname used
74 does not begin with a slash (/), the files are located relative
75 to the <code class="directive"><a href="./mod/core.html#serverroot">ServerRoot</a></code>. Be careful
76 about locating files in paths which are writable by non-root users.
77 See the <a href="misc/security_tips.html#serverroot">security tips</a>
78 documentation for more details.</p>
79 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
81 <h2><a name="resource" id="resource">Limiting Resource Usage</a></h2>
84 <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>
86 <p>The <code class="directive">LimitRequest</code>*
87 directives are used to place limits on the amount of resources
88 httpd will use in reading requests from clients. By limiting
89 these values, some kinds of denial of service attacks can be
92 <p>The <code class="directive">RLimit</code>* directives
93 are used to limit the amount of resources which can be used by
94 processes forked off from the httpd children. In particular,
95 this will control resources used by CGI scripts and SSI exec
98 <p>The <code class="directive"><a href="./mod/mpm_common.html#threadstacksize">ThreadStackSize</a></code>
99 directive is used with some platforms to control the stack size.</p>
100 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
101 <div class="section">
102 <h2><a name="implementation" id="implementation">Implementation Choices</a></h2>
105 <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>
107 <p>The <code class="directive">Mutex</code> directive can be used to change
108 the underlying implementation used for mutexes, in order to relieve
109 functional or performance problems with <a class="glossarylink" href="./glossary.html#apr" title="see glossary">APR</a>'s
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113 <p><span>Available Languages: </span><a href="./en/server-wide.html" title="English"> en </a> |
114 <a href="./fr/server-wide.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
115 <a href="./ja/server-wide.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
116 <a href="./ko/server-wide.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
117 <a href="./tr/server-wide.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
118 </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. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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