From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sasa Stupar <sasa@stupar.homelinux.net>
Subject: Re: Redirection question
Date: Mon, 20 Dec 2004 18:05:49 +0100
Message-ID: <41C7066D.7050604@stupar.homelinux.net>
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Sasa Stupar a =C3=A9crit :

> Hi!
>=20
> I have installed mail server on my lan. Now I would like to redirect al=
l=20
> lan users to use that mail server as smtp (similar as transparent proxy=
=20
> with squid). How do I do that smtp redirection?
> I was thinking something like:
> -------------
> iptables -t nat -A PREROUTING -i eth0 -s ! smtp-box -p tcp --dport 25 -=
j=20
> DNAT --to smtp-box:25
> iptables -t nat -A POSTROUTING -o eth0 -s local-network -d smtp-box -j =

> SNAT --to iptables-box
> iptables -A FORWARD -s local-network -d smtp-box -i eth0 -o eth0 -p tcp=
=20
> --dport 25 -j ACCEPT
> --------------
> Is this correct?
>=20
> Regards,
> Sasa
>=20

I forgot some more infos:
running on FC3 with sendmail. This is also a router with 2 NIC
installed: one for internet and one for LAN.

Sasa