Sun, 12 Aug 2001 10:00:02 +1000
>I would like to know if I could, when the connection is made on the pop3
>server the IP that is connecting to the server is that from internet (the
>legal number) and I want to see the internal card (private) of the firewall
>connecting and not the legal number.
>I thing this would be done with some sort of nat can some help me ?
This seems like a very strange thing to want to do but...!
Anyway, I guess this could be done like this:
iptables -t nat -A PREROUTING -d <external-ip> --d-port pop3 -j DNAT --to
<internal-ip of mail-server>
you then need a rule in you POSTROUTING chain:
iptables -t nat -A POSTROUTING -d <internal-ip of mailserver> -j SNAT --to
<firewall ip (internal)>
Please note: I have not tried this; logically it should work but I would
also guess that it might produces some strange results.
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