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-<title>Binding - Apache HTTP Server</title>
-<link href="./style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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-<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>
-<p class="apache">Apache HTTP Server Version 2.0</p>
-<img alt="" src="./images/feather.gif" /></div>
-<div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div>
-<div id="path">
-<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 2.0</a></div><div id="page-content"><div id="preamble"><h1>Binding</h1>
-<div class="toplang">
-<p><span>Available Languages: </span><a href="./en/bind.html" title="English"> en </a> |
-<a href="./es/bind.html" hreflang="es" rel="alternate" title="Español"> es </a> |
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-</div>
-
- <p>Configuring Apache to listen on specific addresses and ports.</p>
- </div>
-<div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#overview">Overview</a></li>
-<li><img alt="" src="./images/down.gif" /> <a href="#ipv6">Special IPv6 Considerations</a></li>
-<li><img alt="" src="./images/down.gif" /> <a href="#virtualhost">How This Works With Virtual Hosts</a></li>
-</ul><h3>See also</h3><ul class="seealso"><li><a href="vhosts/">Virtual Hosts</a></li><li><a href="dns-caveats.html">DNS Issues</a></li></ul></div>
-<div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
-<div class="section">
-<h2><a name="overview" id="overview">Overview</a></h2>
-
-
- <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td><ul><li><code class="module"><a href="./mod/core.html">core</a></code></li><li><code class="module"><a href="./mod/mpm_common.html">mpm_common</a></code></li></ul></td><td><ul><li><code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code></li><li><code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code></li></ul></td></tr></table>
-
-
- <p>When Apache starts, it binds to some port and address on
- the local machine and waits for incoming requests. By default,
- it listens to all addresses on the machine. However, it needs to
- be told to listen on specific ports, or to listen on only selected
- addresses, or a combination. This is often combined with the
- Virtual Host feature which determines how Apache responds to
- different IP addresses, hostnames and ports.</p>
-
- <p>The <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
- directive tells the server to accept
- incoming requests only on the specified port or
- address-and-port combinations. If only a port number is
- specified in the <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
- directive, the server
- listens to the given port on all interfaces. If an IP address
- is given as well as a port, the server will listen on the given
- port and interface. Multiple <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code> directives may be used to
- specify a number of addresses and ports to listen on. The
- server will respond to requests from any of the listed
- addresses and ports.</p>
-
- <p>For example, to make the server accept connections on both
- port 80 and port 8000, use:</p>
-
- <div class="example"><p><code>
- Listen 80<br />
- Listen 8000
- </code></p></div>
-
- <p>To make the server accept connections on two specified
- interfaces and port numbers, use</p>
-
- <div class="example"><p><code>
- Listen 192.170.2.1:80<br />
- Listen 192.170.2.5:8000
- </code></p></div>
-
- <p>IPv6 addresses must be surrounded in square brackets, as in the
- following example:</p>
-
- <div class="example"><p><code>
- Listen [2001:db8::a00:20ff:fea7:ccea]:80
- </code></p></div>
- </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
-<div class="section">
-<h2><a name="ipv6" id="ipv6">Special IPv6 Considerations</a></h2>
-
-
- <p>A growing number of platforms implement IPv6, and APR supports
- IPv6 on most of these platforms, allowing Apache to allocate IPv6
- sockets and handle requests which were sent over IPv6.</p>
-
- <p>One complicating factor for Apache administrators is whether or
- not an IPv6 socket can handle both IPv4 connections and IPv6
- connections. Handling IPv4 connections with an IPv6 socket uses
- IPv4-mapped IPv6 addresses, which are allowed by default on most
- platforms but are disallowed by default on FreeBSD, NetBSD, and
- OpenBSD in order to match the system-wide policy on those
- platforms. But even on systems where it is disallowed by default, a
- special <code class="program"><a href="./programs/configure.html">configure</a></code> parameter can change this behavior
- for Apache.</p>
-
- <p>If you want Apache to handle IPv4 and IPv6 connections with a
- minimum of sockets, which requires using IPv4-mapped IPv6 addresses,
- specify the <code>--enable-v4-mapped</code> <code class="program"><a href="./programs/configure.html">configure</a></code>
- option and use generic <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
- directives like the following:</p>
-
- <div class="example"><p><code>
- Listen 80
- </code></p></div>
-
- <p>With <code>--enable-v4-mapped</code>, the Listen directives in the
- default configuration file created by Apache will use this form.
- <code>--enable-v4-mapped</code> is the default on all platforms but
- FreeBSD, NetBSD, and OpenBSD, so this is probably how your Apache was
- built.</p>
-
- <p>If you want Apache to handle IPv4 connections only, regardless of
- what your platform and APR will support, specify an IPv4 address on all
- <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code> directives, as in the
- following examples:</p>
-
- <div class="example"><p><code>
- Listen 0.0.0.0:80<br />
- Listen 192.170.2.1:80
- </code></p></div>
-
- <p>If you want Apache to handle IPv4 and IPv6 connections on separate
- sockets (i.e., to disable IPv4-mapped addresses), specify the
- <code>--disable-v4-mapped</code> <code class="program"><a href="./programs/configure.html">configure</a></code> option and
- use specific Listen directives like the following:</p>
-
- <div class="example"><p><code>
- Listen [::]:80<br />
- Listen 0.0.0.0:80
- </code></p></div>
-
- <p>With <code>--disable-v4-mapped</code>, the Listen directives in the
- default configuration file created by Apache will use this form.
- <code>--disable-v4-mapped</code> is the default on FreeBSD, NetBSD, and
- OpenBSD.</p>
-
- </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
-<div class="section">
-<h2><a name="virtualhost" id="virtualhost">How This Works With Virtual Hosts</a></h2>
-
-
- <p><code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code> does not implement
- Virtual Hosts. It only tells the main server what addresses and ports to
- listen to. If no <code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code> directives are used, the server will behave
- the same for all accepted requests. However,
- <code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code>
- can be used to specify a different behavior
- for one or more of the addresses and ports. To implement a
- VirtualHost, the server must first be told to listen to the
- address and port to be used. Then a
- <code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code> section
- should be created for a specified address and port to set the
- behavior of this virtual host. Note that if the
- <code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code>
- is set for an address and port that the
- server is not listening to, it cannot be accessed.</p>
- </div></div>
-<div class="bottomlang">
-<p><span>Available Languages: </span><a href="./en/bind.html" title="English"> en </a> |
-<a href="./es/bind.html" hreflang="es" rel="alternate" title="Español"> es </a> |
-<a href="./fr/bind.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
-<a href="./ja/bind.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
-<a href="./ko/bind.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
-<a href="./tr/bind.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
-</div><div id="footer">
-<p class="apache">Copyright 2009 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>
-<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>
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Code Review / bottlenecks.git / blobdiff