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167c53d624e82d105b1517e9599195a30ddb5de8stoddard<title>Apache Virtual Host documentation - Apache HTTP Server</title>
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167c53d624e82d105b1517e9599195a30ddb5de8stoddard<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>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<p class="apache">Apache HTTP Server Version 2.1</p>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<div class="up"><a href="../"><img title="<-" alt="<-" src="/images/left.gif" /></a></div>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.1</a></div><div id="page-content"><div id="preamble"><h1>Apache Virtual Host documentation</h1>
4e8732935d428b2a70151b178a95cbba5d3839f5wrowe<p><span>Available Languages: </span><a href="/de/vhosts/" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<a href="/en/vhosts/" title="English"> en </a> |
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<a href="/ja/vhosts/" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<a href="/ko/vhosts/" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <p>The term <cite>Virtual Host</cite> refers to the practice of
167c53d624e82d105b1517e9599195a30ddb5de8stoddard running more than one web site (such as
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <code>www.company1.com</code> and <code>www.company2.com</code>)
167c53d624e82d105b1517e9599195a30ddb5de8stoddard on a single machine. Virtual hosts can be "<a href="ip-based.html">IP-based</a>", meaning that you have a
4e8732935d428b2a70151b178a95cbba5d3839f5wrowe different IP address for every web site, or "<a href="name-based.html">name-based</a>", meaning that you have
167c53d624e82d105b1517e9599195a30ddb5de8stoddard multiple names running on each IP address. The fact that they
167c53d624e82d105b1517e9599195a30ddb5de8stoddard are running on the same physical server is not apparent to the
167c53d624e82d105b1517e9599195a30ddb5de8stoddard end user.</p>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <p>Apache was one of the first servers to support IP-based
167c53d624e82d105b1517e9599195a30ddb5de8stoddard virtual hosts right out of the box. Versions 1.1 and later of
167c53d624e82d105b1517e9599195a30ddb5de8stoddard Apache support both IP-based and name-based virtual hosts
167c53d624e82d105b1517e9599195a30ddb5de8stoddard (vhosts). The latter variant of virtual hosts is sometimes also
9ec65cbae2f760e485a1c54df5b19853688d5c91wrowe called <em>host-based</em> or <em>non-IP virtual hosts</em>.</p>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <p>Below is a list of documentation pages which explain all
167c53d624e82d105b1517e9599195a30ddb5de8stoddard details of virtual host support in Apache version 1.3 and
1f2f357528d122de2c7886a073b4eee8766d5c95wrowe<div id="quickview"><ul id="toc"><li><img alt="" src="/images/down.gif" /> <a href="#support">Virtual Host Support</a></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<li><img alt="" src="/images/down.gif" /> <a href="#directives">Configuration directives</a></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard</ul><h3>See also</h3><ul class="seealso"><li><code class="module"><a href="/mod/mod_vhost_alias.html">mod_vhost_alias</a></code></li><li><a href="name-based.html">Name-based virtual
167c53d624e82d105b1517e9599195a30ddb5de8stoddardhosts</a></li><li><a href="ip-based.html">IP-based virtual hosts</a></li><li><a href="examples.html">Virtual host examples</a></li><li><a href="fd-limits.html">File descriptor limits</a></li><li><a href="mass.html">Mass virtual hosting</a></li><li><a href="details.html">Details of host matching</a></li></ul></div>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard<h2><a name="support" id="support">Virtual Host Support</a></h2>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><a href="name-based.html">Name-based Virtual Hosts</a> (More
4e8732935d428b2a70151b178a95cbba5d3839f5wrowe than one web site per IP address)</li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><a href="ip-based.html">IP-based Virtual Hosts</a> (An IP
167c53d624e82d105b1517e9599195a30ddb5de8stoddard address for each web site)</li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><a href="examples.html">Virtual Host examples for common
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><a href="fd-limits.html">File Descriptor Limits</a> (or,
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><a href="mass.html">Dynamically Configured Mass Virtual
9ec65cbae2f760e485a1c54df5b19853688d5c91wrowe <li><a href="details.html">In-Depth Discussion of Virtual Host
26b9ccb55ff33097af4914f2e4bd36fec99a039dwrowe</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
1f2f357528d122de2c7886a073b4eee8766d5c95wrowe<h2><a name="directives" id="directives">Configuration directives</a></h2>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><code class="directive"><a href="/mod/core.html#virtualhost"><VirtualHost></a></code></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><code class="directive"><a href="/mod/core.html#namevirtualhost">NameVirtualHost</a></code></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><code class="directive"><a href="/mod/core.html#servername">ServerName</a></code></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><code class="directive"><a href="/mod/core.html#serveralias">ServerAlias</a></code></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <li><code class="directive"><a href="/mod/core.html#serverpath">ServerPath</a></code></li>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <p>If you are trying to debug your virtual host configuration, you
167c53d624e82d105b1517e9599195a30ddb5de8stoddard may find the Apache <code>-S</code> command line switch
167c53d624e82d105b1517e9599195a30ddb5de8stoddard useful. That is, type the following command:</p>
167c53d624e82d105b1517e9599195a30ddb5de8stoddard <p>This command will dump out a description of how Apache parsed
990e1969a428b8844e07aad088df41340cd009d4wrowe the configuration file. Careful examination of the IP addresses and
4439ba95daf7b82794fe338726790e2dab89d119wrowe server names may help uncover configuration mistakes. (See <a href="/programs/httpd.html">the docs for the httpd program</a> for
4439ba95daf7b82794fe338726790e2dab89d119wrowe other command line options)</p>
4439ba95daf7b82794fe338726790e2dab89d119wrowe<p><span>Available Languages: </span><a href="/de/vhosts/" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
4439ba95daf7b82794fe338726790e2dab89d119wrowe<a href="/en/vhosts/" title="English"> en </a> |
4439ba95daf7b82794fe338726790e2dab89d119wrowe<a href="/ja/vhosts/" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
4439ba95daf7b82794fe338726790e2dab89d119wrowe<a href="/ko/vhosts/" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
4439ba95daf7b82794fe338726790e2dab89d119wrowe<p class="apache">Copyright 1999-2004 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>
4439ba95daf7b82794fe338726790e2dab89d119wrowe<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>