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118 lines
7.4 KiB
XML
118 lines
7.4 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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This file is generated from xml source: DO NOT EDIT
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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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" /><link href="./style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /><link href="./style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link href="./images/favicon.ico" rel="shortcut icon" /></head><body id="manual-page"><div id="page-header"><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-project/">Documentation</a> > <a href="./">Version 2.0</a></div><div id="page-content"><div id="preamble"><h1>Binding</h1>
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<p>Configuring Apache to listen on specific addresses and ports.</p>
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</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>
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<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>
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<p>When Apache starts, it binds to some port and address on
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the local machine and waits for incoming requests. By default,
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it listens to all addresses on the machine. However, it needs to
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be told to listen on specific ports, or to listen on only selected
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addresses, or a combination. This is often combined with the
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Virtual Host feature which determines how Apache responds to
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different IP addresses, hostnames and ports.</p>
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<p>The <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
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directive tells the server to accept
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incoming requests only on the specified port or
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address-and-port combinations. If only a port number is
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specified in the <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
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directive, the server
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listens to the given port on all interfaces. If an IP address
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is given as well as a port, the server will listen on the given
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port and interface. Multiple Listen directives may be used to
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specify a number of addresses and ports to listen on. The
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server will respond to requests from any of the listed
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addresses and ports.</p>
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<p>For example, to make the server accept connections on both
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port 80 and port 8000, use:</p>
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<div class="example"><p><code>
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Listen 80<br />
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Listen 8000
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</code></p></div>
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<p>To make the server accept connections on two specified
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interfaces and port numbers, use</p>
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<div class="example"><p><code>
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Listen 192.170.2.1:80<br />
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Listen 192.170.2.5:8000
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</code></p></div>
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<p>IPv6 addresses must be surrounded in square brackets, as in the
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following example:</p>
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<div class="example"><p><code>
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Listen [fe80::a00:20ff:fea7:ccea]:80
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</code></p></div>
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</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>
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<p>When APR supports IPv6, Apache will create IPv6-capable listening
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sockets by default (i.e., when no IP address is specified on the
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Listen directive). In other words, when APR supports IPv6,</p>
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<div class="example"><p><code>
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Listen 80
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</code></p></div>
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<p>is equivalent to</p>
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<div class="example"><p><code>
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Listen [::]:80
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</code></p></div>
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<p>When APR does not support IPv6,</p>
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<div class="example"><p><code>
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Listen 80
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</code></p></div>
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<p>is equivalent to</p>
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<div class="example"><p><code>
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Listen 0.0.0.0:80
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</code></p></div>
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<p>On some platforms, such as NetBSD, binding to the IPv6 wildcard address
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("::") does not allow Apache to accept connections on IPv4 interfaces.
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In this situation, multiple Listen directives are required, as shown
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below:</p>
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<div class="example"><p><code>
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Listen 0.0.0.0:80<br />
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Listen [::]:0
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</code></p></div>
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<p>Apache does not currently detect this, so the Listen statements must
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be edited manually by the administrator.</p>
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</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>
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<p>Listen does not implement Virtual Hosts. It only tells the
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main server what addresses and ports to listen to. If no
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<code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code>
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directives are used, the server will behave
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the same for all accepted requests. However,
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<code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code>
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can be used to specify a different behavior
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for one or more of the addresses and ports. To implement a
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VirtualHost, the server must first be told to listen to the
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address and port to be used. Then a
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<code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code> section
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should be created for a specified address and port to set the
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behavior of this virtual host. Note that if the
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<code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code>
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is set for an address and port that the
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server is not listening to, it cannot be accessed.</p>
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</div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</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></body></html> |