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Taken from the Debian archive: http://archive.debian.org/debian/dists/Debian-2.0/main/source/net/
111 lines
3.7 KiB
HTML
111 lines
3.7 KiB
HTML
<html>
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<head>
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<title>RINETD(8)</title>
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</head>
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<body bgcolor="#FFFFF0">
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<!--
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Copyright (c) 1997, 1998, Thomas Boutell and Boutell.Com, Inc.
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This software is released for free use under the terms of
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the GNU Public License, version 2 or higher.
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-->
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<table>
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<tr>
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<th width=33% align=left>RINETD(8)
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<th width=33% align=right>Unix System Manager's Manual
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<th width=33% align=right>RINETD(8)
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</tr>
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</table>
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<p>
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<font color="#FF8888" size="4">NAME</font>
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<p>
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rinetd -- internet ``redirection server''
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<p>
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<font color="#FF8888" size="4">SYNOPSIS</font>
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<p>
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<code>/usr/sbin/rinetd</code>
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<p>
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<font color="#FF8888" size="4">VERSION</font>
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<p>
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Version 0.41, 2/11/1998.
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<p>
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<font color="#FF8888" size="4">WHERE TO GET</font>
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<p>
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<a href="ftp://ftp.boutell.com/pub/boutell/rinetd/rinetd.tar.gz">By
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anonymous FTP from ftp.boutell.com</a> in the subdirectory
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<code>boutell/rinetd</code> as the file <code>rinetd.tar.gz</code>.
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<p>
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<font color="#FF8888" size="4">DESCRIPTION</font>
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<p>
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Redirects TCP connections from one IP address and port to another. rinetd
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is a single-process server which handles any number of connections to
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the address/port pairs specified in the file <code>/etc/rinetd.conf</code>.
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Since rinetd runs as a single process using nonblocking I/O, it is
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able to redirect a large number of connections without a severe
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impact on the machine. This makes it practical to run TCP services
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on machines inside an IP masquerading firewall.
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<p>
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rinetd should be launched at boot time, using the following syntax:
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<p>
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<code>/usr/sbin/rinetd</code>
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<p>
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The format of <code>/etc/rinetd.conf</code> is as follows:
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<p>
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<code>bindaddress bindport connectaddress connectport</code>
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<p>
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For example:
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<p>
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<code>206.125.69.81 80 10.1.1.2 80</code>
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<p>
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Would redirect all connections to port 80 of the "real" IP address
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206.125.69.81, which could be a virtual interface, through
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rinetd to port 80 of the address 10.1.1.2, which would typically
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be a machine on the inside of a firewall which has no
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direct routing to the outside world.
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<p>
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Service names can be specified instead of port numbers. On most systems,
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service names are defined in the file /etc/services.
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<p>
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Both IP addresses and hostnames are accepted for
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bindaddress and connectaddress.
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<p>
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rinetd redirects TCP connections only. There is
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no support for UDP.
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<p>
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The kill -1 signal (SIGHUP) can be used to cause rinetd
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to reload its configuration file <strong>without</strong> interrupting existing
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connections (this was added in version 0.4). Under Linux\(tm the process id
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is saved in the file \fI/var/run/rinetd.pid\fR
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to facilitate the kill -HUP (added in version 0.41).
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<p>
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<font color="#FF8888" size="4">BUGS</font>
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<p>
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rinetd does not currently produce any log information. The
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server redirected to is not able to identify the host the
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client really came from. Sockets would theoretically lose
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data when closed with <code>SO_LINGER</code> turned off, but in Linux
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this is not the case (kernel source comments support this
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belief on my part). On non-Linux platforms, alternate code
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which uses a different trick to work around blocking close()
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is provided, but this code is untested. The manpage
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is sketchy.
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<p>
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<font color="#FF8888" size="4">LICENSE</font>
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<p>
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Copyright (c) 1997, 1998,
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<a href="http://www.boutell.com/boutell">Thomas Boutell</a> and
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<a href="http://www.boutell.com/">Boutell.Com, Inc.</a>
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This software is released for free use under the terms of
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the GNU Public License, version 2 or higher.
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<p>
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<font color="#FF8888" size="4">CONTACT INFORMATION</font>
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<p>
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See <a href="http://www.boutell.com/rinetd">the rinetd web page</a>
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for the latest release.
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Thomas Boutell can be reached by email:
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<a href="mailto:boutell@boutell.com">boutell@boutell.com</a>
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<p>
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<font color="#FF8888" size="4">THANKS</font>
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<p>
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Thanks are due to Bill Davidsen.
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