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Tue Nov 1 09:56:12 2016 UTC (7 years, 8 months 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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    5: <TITLE>Network Address Translation (NAT)</TITLE>
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    8: 
    9: <A HREF="mpd.html"><EM>Mpd 5.8 User Manual</EM></A>
   10:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
   11:  <b>:</b> <EM>Network Address Translation (NAT)</EM><BR>
   12: <b>Previous:</b> <A HREF="mpd38.html"><EM>IP address pools</EM></A><BR>
   13: <b>Next:</b> <A HREF="mpd40.html"><EM>Control console</EM></A>
   14: 
   15: 
   16: <HR NOSHADE>
   17:   <H2><A NAME="39"></A>4.14. Network Address Translation (NAT)<A NAME="nat"></A></H2>
   18: 
   19: <p>This chapter describes commands for configuring Network Address
   20: Translation on Mpd's interfaces. NAT is implemented by 
   21: <code>ng_nat(4)</code> node. To enable it on a particular
   22: interface <code>nat</code> option should be used.</p>
   23: <p><b>Note:</b> ng_nat node is available only on FreeBSD 6.0-RELEASE
   24: and newer. Some additional options like setting target address
   25: implemeted in later versions.</p>
   26: <p>
   27: <dl>
   28: 
   29: <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>
   30: 
   31: <dt><b><code>set nat target <em>ip</em></code></b><dd><p>Set target IP address for unknown incoming packets. If not specified,
   32: packet will not be modified.</p>
   33: 
   34: <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>
   35: 
   36: <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
   37: (optionally from specified remote address)
   38: to a machine on the local network.</p>
   39: 
   40: <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,
   41: (optionally from specified remote address)
   42: to a host and port of a machine on the local network.</p>
   43: 
   44: <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>
   45: 
   46: <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>
   47: 
   48: <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>
   49: 
   50: <dt><b><code>set nat enable <em>option ...</em> </code></b><dd>
   51: <dt><b><code>set nat disable <em>option ...</em> </code></b><dd>
   52: <p>Enable and disable nat options.</p>
   53: 
   54: </dl>
   55: </p>
   56: 
   57: <p>The following options are supported:</p>
   58: <p>
   59: <dl>
   60: 
   61: <dt><b><code>log</code></b><dd><p>Enable statistics logging.</p>
   62: <p>Default is disable.</p>
   63: 
   64: <dt><b><code>incoming</code></b><dd><p>Allow unknown incoming packets to pass.</p>
   65: <p>Default is enable.</p>
   66: 
   67: <dt><b><code>same-ports</code></b><dd><p>Try to use same ports while aliasing.</p>
   68: <p>Default is enable.</p>
   69: 
   70: <dt><b><code>unreg-only</code></b><dd><p>Enables aliasing only for unregistered networks.</p>
   71: <p>Default is disable.</p>
   72: 
   73: </dl>
   74: </p>
   75: 
   76:  <HR NOSHADE>
   77: <A HREF="mpd.html"><EM>Mpd 5.8 User Manual</EM></A>
   78:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
   79:  <b>:</b> <EM>Network Address Translation (NAT)</EM><BR>
   80: <b>Previous:</b> <A HREF="mpd38.html"><EM>IP address pools</EM></A><BR>
   81: <b>Next:</b> <A HREF="mpd40.html"><EM>Control console</EM></A>
   82: 
   83: 
   84: 
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