torrent routing

[outspoken]

hey, im trying to run torrents and i keep getting the issue of not having my 6881 port opened. of course this is not possible from the computer that i am running things from as my ISP has a lock on the switch/rotuer combo they gave me which denies any newly initialized incoming traffic unless estableshed by my outgoing requests. (i think that makes sense).

anyhow, i haven't used iptables in a long time, i was more familiar with ipchains back in 1999 but of course that has been a very long time.

i have TWO static IP addresses. one is attached to the switch/router supplied by the ISP and the other is for me to do with what i want. i have it setup on a linux server with two network cards.

what i want to do is have my personal computer use the ISP's router/switch for everything that i typically do and then route my torrent traffic through my linux server.

this should be fairly easy using iptables im guessing. on the client machine setup iptables so that all traffic goes out eth0 (to ISP router) but any traffic for port 6881 goes to the eth1 (linux server). and then on the linux server setup iptables to post/pre-route the 6881 traffic between the internet and the client machine?

does this sound right to anyone else. I'm just trying to get the concept down before I get too involved in the scripting and realize it may not work.