From mboxrd@z Thu Jan  1 00:00:00 1970
From: netfilter@serverguy.net
Subject: Problem with SNAT and same port number
Date: Mon, 23 Feb 2004 13:30:59 +1000
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To: netfilter@lists.netfilter.org

Hi,

I am wanting to change the source address of outgoing packets that have a=
 src=20
port of 53.

I have tried=20
/sbin/iptables -A POSTROUTING -p tcp -t nat -o bond0 --sport 53 -j SNAT=20
--to-source 192.168.0.1:53

This doesnt work, it seems to be that you cant SNAT to a port the same as=
 the=20
original src port because

/sbin/iptables -A POSTROUTING -p tcp -t nat -o bond0 --sport 53 -j SNAT=20
--to-source 192.168.0.1

/sbin/iptables -A POSTROUTING -p tcp -t nat -o bond0 --sport 53 -j SNAT=20
--to-source 192.168.0.1:52

both works, but obviously not the same results as I wanted because the sr=
c=20
port is also changed.

Is there any other way to do what I am wanting??

TIA