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<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>