Re: Redirection question

[Sasa Stupar <sasa@stupar.homelinux.net>]

Sasa Stupar a écrit :

> Hi!
> 
> I have installed mail server on my lan. Now I would like to redirect all 
> lan users to use that mail server as smtp (similar as transparent proxy 
> 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 
> 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 
> --dport 25 -j ACCEPT
> --------------
> Is this correct?
> 
> Regards,
> Sasa
> 

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