Hy, I`ve been trying to set up a configuration like the next one
eth0-internet(dhcp)
eth1-internet(dhcp)
eth2-internet(static)
eth3-lan(multiple ip addreeses)

My question is as follows
How do i setup the routing table to route request coming from eth3 from a certain ip FROM a certain port ( or port range ) and that alone should go thru a diferent route than the default one ( wich by the way is multiroute )

i want port 6020 ( from a certain pc in the network) to be nat-ed to go thru the static interface ( and ip )

the thing with answers going back thru the eth3 and toward the host is easy
but the routing part i do not know how to
i mention i DO NOT have the ROUTE target in iptables ( that would simplify ) and i would like this setup to work without the ROUTE target as it`s not only for this server )

Something like
ip rule add from 192.168.0.8/32 port 6020 table rds

LE:
I wonder one more thing:
If i mark the packets in the FORWARD chain of mangle
can i use fwmark in ip route to route those specific packets ?
i`m gonna try and post back later if it works

I found some good routing table examples from here:

https://help.ubuntu.com/community/Router

Near the bottom is the code where they setup the iptalbes

Hope this helps...

Thanks but it is not what i am looking for.
I`ve already set up the networking parameters and the internet connection for the other pc`s
It`s all working perfectly from this point of view.
What i am looking is something a little more complicated. ( connections coming from on pc from port xxxx to go thru a diferent route ...
I`l try some things and the come and post back again if i found something.

Ok it seems a simple and easy SNAT should do the trick.
I`l give it a try as soon as i found out exacly wich ports does the aplication use for outgoing connections. I hope it uses the same port :|
Oh btw got any ideea how to detect connections related to an established connection ?
because i gotta change theyr destination to make sure they reach the right place :|