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From: "\"Яцко Эллад Геннадьевич (ngs)\"" <eyatsko@ngs.ru>
To: netfilter@vger.kernel.org
Subject: How to make bi-directional NAT'ting?
Date: Tue, 23 Aug 2011 12:26:15 +0400	[thread overview]
Message-ID: <4E536427.2040503@ngs.ru> (raw)

Hello!

I have some specific problem with Cisco CP7961G IP phone.
It sends packets to external Softswitch using one UDP port
which differs from 5060 (voipControlPort in its .XML), but
it waits answers on 5060!
And I can't do anything with it! I have tried Firmware from
8.0.x up to 8.5.x - all the same!

One thing I think is make corresponding translation on IPTables.
SNAT in direct path (from 79161 to Softswitch) and DNAT
in backward direction (from outside Softswitch to 7961).

BUT IT DOESN'T WORK! :-)

$IPTABLES -t nat -A PREROUTING          -p udp -s 80.251.x.x 
                         -d 80.251.y.y --dport 5060 -j DNAT 
--to-destination 172.16.128.200:5060
$IPTABLES -t nat -A POSTROUTING -o eth0 -p udp -s 172.16.128.0/24 
--sport 1024:65535 -d 80.251.x.x --dport 5060 -j SNAT --to-source      
80.251.y.y:5060

What do I do wrong?

Kind regards,
Ellad Yatsko

             reply	other threads:[~2011-08-23  8:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-23  8:26 "Яцко Эллад Геннадьевич (ngs)" [this message]
2011-08-23 10:50 ` How to make bi-directional NAT'ting? Tyler J. Wagner
     [not found]   ` <4E538A10.3030508@runoguy.ru>
2011-08-23 11:35     ` Tyler J. Wagner
2011-08-24  7:35       ` Re: Jan Engelhardt
2011-08-24  8:19         ` Re: Tyler J. Wagner

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