[LARTC] iproute2 + netfilter problem

["saz" <saz@inticomp.com>]

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Hi guys, i have a problem with a configuration what i'm trying to do. 
I have two computers with linux, A and B, connected in the same network with this configuration:

PC1 A: 192.168.192.1

PC2 B: 192.168.192.30

The PC1 A is a firewall doing nat... this one is connected to the internet via an adsl modem and of course it have its own public ip , and the router B is a smtp server but connected behind the router A, what i'm trying to do is redirect the smtp incoming traffic of the router A to the router B using iproute2 and nerfilter tools

This is the configuration on the router A:

iptables -t mangle -A POSTROUTING -p tcp --dport 25 -j MARK --set-mark 1 ( this marks the smtp packets with 1 )

i create a table called "smtp"  in the rt_tables file.

ip rule add fwmark 1 table smtp ( this is the rule for my table smtp )

and finally i declare a via in my smtp table, so the smtp traffic would have to go by this way.

ip route add default via 192.168.192.30 table smtp

Ok... for example if i make a telnet to PC1 on the 25 port.. this should redirect me to PC2 where is my real smtp server, but is not working... any idea of why ? the PC2 have not a firewall..

Thank you!!

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