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b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<title>Apache Virtual Host documentation - Apache HTTP Server</title>
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b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<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>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<div class="up"><a href="../"><img title="<-" alt="<-" src="/images/left.gif" /></a></div>
4b5981e276e93df97c34e4da05ca5cf8bbd937dand<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>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <p>The term <cite>Virtual Host</cite> refers to the practice of
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd running more than one web site (such as
e23d878014f00a27b043a25e59f809c7af497e5ctakashi <code>www.company1.com</code> and <code>www.company2.com</code>)
e23d878014f00a27b043a25e59f809c7af497e5ctakashi on a single machine. Virtual hosts can be "<a href="ip-based.html">IP-based</a>," meaning that you have a
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd different IP address for every web site, or "<a href="name-based.html">name-based</a>," meaning that you have
a8703cfb67133446eef7af1043640e71486e9ecand multiple names running on each IP address. The fact that they
a8703cfb67133446eef7af1043640e71486e9ecand are running on the same physical server is not apparent to the
a8703cfb67133446eef7af1043640e71486e9ecand end user.</p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <p>Apache was one of the first servers to support IP-based
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd virtual hosts right out of the box. Versions 1.1 and later of
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd Apache support both IP-based and name-based virtual hosts
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd (vhosts). The latter variant of virtual hosts is sometimes also
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd called <em>host-based</em> or <em>non-IP virtual hosts</em>.</p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <p>Below is a list of documentation pages which explain all
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd details of virtual host support in Apache version 1.3 and
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd later.</p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<div id="quickview"><ul id="toc"><li><img alt="" src="/images/down.gif" /> <a href="#support">Virtual Host Support</a></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<li><img alt="" src="/images/down.gif" /> <a href="#directives">Configuration directives</a></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd</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
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60ndhosts</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">Detalis of host matching</a></li></ul></div>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<h2><a name="support" id="support">Virtual Host Support</a></h2>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="name-based.html">Name-based Virtual Hosts</a> (More
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd than one web site per IP address)</li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="ip-based.html">IP-based Virtual Hosts</a> (An IP
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd address for each web site)</li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="examples.html">Virtual Host examples for common
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="fd-limits.html">File Descriptor Limits</a> (or,
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="mass.html">Dynamically Configured Mass Virtual
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><a href="details.html">In-Depth Discussion of Virtual Host
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<h2><a name="directives" id="directives">Configuration directives</a></h2>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><code class="directive"><a href="/mod/core.html#virtualhost"><VirtualHost></a></code></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><code class="directive"><a href="/mod/core.html#namevirtualhost">NameVirtualHost</a></code></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><code class="directive"><a href="/mod/core.html#servername">ServerName</a></code></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><code class="directive"><a href="/mod/core.html#serveralias">ServerAlias</a></code></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <li><code class="directive"><a href="/mod/core.html#serverpath">ServerPath</a></code></li>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <p>If you are trying to debug your virtual host configuration, you
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd useful. That is, type the following command:</p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd <p>This command will dump out a description of how Apache parsed
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd the configuration file. Careful examination of the IP addresses and
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd server names may help uncover configuration mistakes. (See <a href="/programs/httpd.html">the docs for the httpd program</a> for
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd other command line options)</p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</a></p>
b05ab3ff5ab54aa22610b13d56eaba6ddfc3db60nd<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>