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Tue Nov 1 09:56:12 2016 UTC (8 years, 1 month ago) by misho
Branches: mpd, MAIN
CVS tags: v5_8p7, v5_8p1_cross, v5_8p1, v5_8, HEAD
mpd 5.8

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<A HREF="mpd.html"><EM>Mpd 5.8 User Manual</EM></A>
 <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
 <b>:</b> <EM>Network Address Translation (NAT)</EM><BR>
<b>Previous:</b> <A HREF="mpd38.html"><EM>IP address pools</EM></A><BR>
<b>Next:</b> <A HREF="mpd40.html"><EM>Control console</EM></A>


<HR NOSHADE>
  <H2><A NAME="39"></A>4.14. Network Address Translation (NAT)<A NAME="nat"></A></H2>

<p>This chapter describes commands for configuring Network Address
Translation on Mpd's interfaces. NAT is implemented by 
<code>ng_nat(4)</code> node. To enable it on a particular
interface <code>nat</code> option should be used.</p>
<p><b>Note:</b> ng_nat node is available only on FreeBSD 6.0-RELEASE
and newer. Some additional options like setting target address
implemeted in later versions.</p>
<p>
<dl>

<dt><b><code>set nat address <em>ip</em></code></b><dd><p>Set alias IP address. If not specified, interface IP will be used.</p>

<dt><b><code>set nat target <em>ip</em></code></b><dd><p>Set target IP address for unknown incoming packets. If not specified,
packet will not be modified.</p>

<dt><b><code>set nat red-addr <em>alias_addr</em> <em>local_addr</em></code></b><dd><p>Redirect traffic for public (alias) IP address to a machine on the local network.</p>

<dt><b><code>set nat red-proto <em>proto</em> <em>alias_addr</em> <em>local_addr</em> [ <em>remote_addr</em> ]</code></b><dd><p>Redirect traffic of specified protocol for public (alias) IP address
(optionally from specified remote address)
to a machine on the local network.</p>

<dt><b><code>set nat red-port <em>proto</em> <em>alias_addr</em> <em>alias_port</em> <em>local_addr</em> <em>local_port</em> [ <em>remote_addr</em> <em>remote_port</em> ]</code></b><dd><p>Redirect incoming connections arriving to given public (alias) address and port,
(optionally from specified remote address)
to a host and port of a machine on the local network.</p>

<dt><b><code>unset nat red-addr <em>alias_addr</em> <em>local_addr</em></code></b><dd><p>Deletes specific <em>set nat red-addr ...</em> rule.</p>

<dt><b><code>unset nat red-proto <em>proto</em> <em>alias_addr</em> <em>local_addr</em> [ <em>remote_addr</em> ]</code></b><dd><p>Deletes specific <em>set nat red-proto ...</em> rule.</p>

<dt><b><code>unset nat red-port <em>proto</em> <em>alias_addr</em> <em>alias_port</em> <em>local_addr</em> <em>local_port</em> [ <em>remote_addr</em> <em>remote_port</em> ]</code></b><dd><p>Deletes specific <em>set nat red-port ...</em> rule.</p>

<dt><b><code>set nat enable <em>option ...</em> </code></b><dd>
<dt><b><code>set nat disable <em>option ...</em> </code></b><dd>
<p>Enable and disable nat options.</p>

</dl>
</p>

<p>The following options are supported:</p>
<p>
<dl>

<dt><b><code>log</code></b><dd><p>Enable statistics logging.</p>
<p>Default is disable.</p>

<dt><b><code>incoming</code></b><dd><p>Allow unknown incoming packets to pass.</p>
<p>Default is enable.</p>

<dt><b><code>same-ports</code></b><dd><p>Try to use same ports while aliasing.</p>
<p>Default is enable.</p>

<dt><b><code>unreg-only</code></b><dd><p>Enables aliasing only for unregistered networks.</p>
<p>Default is disable.</p>

</dl>
</p>

 <HR NOSHADE>
<A HREF="mpd.html"><EM>Mpd 5.8 User Manual</EM></A>
 <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
 <b>:</b> <EM>Network Address Translation (NAT)</EM><BR>
<b>Previous:</b> <A HREF="mpd38.html"><EM>IP address pools</EM></A><BR>
<b>Next:</b> <A HREF="mpd40.html"><EM>Control console</EM></A>



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