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79 lines
2.9 KiB
HTML
79 lines
2.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML><HEAD>
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<TITLE>Setting which addresses and ports Apache uses</TITLE>
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</HEAD>
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<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
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<BODY
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#000080"
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ALINK="#FF0000"
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>
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<!--#include virtual="header.html" -->
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<H1 ALIGN="CENTER">Setting which addresses and ports Apache uses</H1>
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<p>When Apache starts, it connects to some port and address on the
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local machine and waits for incoming requests. By default, it
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listens to all addresses on the machine, and to the port
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as specified by the <code>Port</code> directive in the server configuration.
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However, it can be told to listen to more the one port, or to listen
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to only selected addresses, or a combination. This is often combined
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with the Virtual Host feature which determines how Apache
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responds to different IP addresses, hostnames and ports.</p>
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<p>The <code>Listen</code> directive tells the server to accept
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incoming requests only on the specified port or address-and-port
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combinations. If only a port number is specified in the
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<code>Listen</code> directive, the server listens to the given port on
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all interfaces, instead of the port given by the <code>Port</code>
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directive. If an IP address is given as well as a port, the server
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will listen on the given port and interface. Multiple Listen
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directives may be used to specify a number of addresses and ports to
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listen to. The 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 port
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80 and port 8000, use:
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<PRE>
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Listen 80
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Listen 8000
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</PRE>
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To make the server accept connections on two specified
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interfaces and port numbers, use
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<PRE>
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Listen 192.170.2.1:80
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Listen 192.170.2.5:8000
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</PRE>
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<H2>How this works with Virtual Hosts</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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<VirtualHost> directives are used, the server will behave the
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same for all accepted requests. However, <VirtualHost> can be
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used to specify a different behavior for one or more of the addresses
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and ports. To implement a VirtualHost, the server must first be told
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to listen to the address and port to be used. Then a
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<VirtualHost> section should be created for a specified address
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and port to set the behavior of this virtual host. Note that if the
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<VirtualHost> is set for an address and port that the server is
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not listening to, it cannot be accessed.
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<H2>See also</H2>
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See also the documentation on
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<a href="mod/mpm_common.html#listen">Listen directive</a>,
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<A HREF="vhosts/">Virtual Hosts</A>,
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<A HREF="mod/core.html#port">Port directive</A>,
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<A HREF="dns-caveats.html">DNS Issues</A>
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and
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<A HREF="mod/core.html#virtualhost"><VirtualHost> section</A>.
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<!--#include virtual="footer.html" -->
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</BODY>
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</HTML>
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