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<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE manualpage SYSTEM "../style/manualpage.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $Revision: 1.13 $ -->
<!--
Copyright 2002-2004 The Apache Software Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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<manualpage metafile="index.xml.meta">
<parentdocument href="../"/>
<title>Apache Virtual Host documentation</title>
<summary>
<p>The term <cite>Virtual Host</cite> refers to the practice of
running more than one web site (such as
<code>www.company1.com</code> and <code>www.company2.com</code>)
on a single machine. Virtual hosts can be "<a
href="ip-based.html">IP-based</a>", meaning that you have a
different IP address for every web site, or "<a
href="name-based.html">name-based</a>", meaning that you have
multiple names running on each IP address. The fact that they
are running on the same physical server is not apparent to the
end user.</p>
<p>Apache was one of the first servers to support IP-based
virtual hosts right out of the box. Versions 1.1 and later of
Apache support both IP-based and name-based virtual hosts
(vhosts). The latter variant of virtual hosts is sometimes also
called <em>host-based</em> or <em>non-IP virtual hosts</em>.</p>
<p>Below is a list of documentation pages which explain all
details of virtual host support in Apache version 1.3 and
later.</p>
</summary>
<seealso><module>mod_vhost_alias</module></seealso>
<seealso><a href="name-based.html">Name-based virtual
hosts</a></seealso>
<seealso><a href="ip-based.html">IP-based virtual hosts</a></seealso>
<seealso><a href="examples.html">Virtual host examples</a></seealso>
<seealso><a href="fd-limits.html">File descriptor limits</a></seealso>
<seealso><a href="mass.html">Mass virtual hosting</a></seealso>
<seealso><a href="details.html">Details of host matching</a></seealso>
<section id="support"><title>Virtual Host Support</title>
<ul>
<li><a href="name-based.html">Name-based Virtual Hosts</a> (More
than one web site per IP address)</li>
<li><a href="ip-based.html">IP-based Virtual Hosts</a> (An IP
address for each web site)</li>
<li><a href="examples.html">Virtual Host examples for common
setups</a></li>
<li><a href="fd-limits.html">File Descriptor Limits</a> (or,
<em>Too many log files</em>)</li>
<li><a href="mass.html">Dynamically Configured Mass Virtual
Hosting</a></li>
<li><a href="details.html">In-Depth Discussion of Virtual Host
Matching</a></li>
</ul>
</section>
<section id="directives"><title>Configuration directives</title>
<ul>
<li><directive type="section"
module="core">VirtualHost</directive></li>
<li><directive module="core">NameVirtualHost</directive></li>
<li><directive module="core">ServerName</directive></li>
<li><directive module="core">ServerAlias</directive></li>
<li><directive module="core">ServerPath</directive></li>
</ul>
<p>If you are trying to debug your virtual host configuration, you
may find the Apache <code>-S</code> command line switch
useful. That is, type the following command:</p>
<example>
/usr/local/apache2/bin/httpd -S
</example>
<p>This command will dump out a description of how Apache parsed
the configuration file. Careful examination of the IP addresses and
server names may help uncover configuration mistakes. (See <a
href="../programs/httpd.html">the docs for the httpd program</a> for
other command line options)</p>
</section>
</manualpage>
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