NAT, shorewall, port forwarding & Bit Torrent.

[cfd]

Disclaimer. This may have nothing to do with the Gentoo Machine I am running, but I am at my witt's end, so any input would be appreciated.

I have a small LAN

internets
V
FW(Sentry FW CD running Shorewall)
+
+->dns/dhcp (debian)
+->web server (gentoo)
+->Worstation (gentoo)

And I noticed a problem when trying to use bit torrent applications (~x86 BitTornado and Azureus[bin]) from the workstation. Any tests for porper configuration tell me that I get a NAT falure.

I have a Shorewall DNAT rule to forward the bit torrent requests to the Workstation.

Code: Select all

DNAT            net             loc:192.168.0.x tcp     6881:6889

I have a very simialr one to forward traffic to my webserver. It works fine.

Code: Select all

DNAT            net             loc:192.168.0.y tcp     http

I get no errors from the FW or Shorewall - it verbalizes the port setup like any other.

All the documentation I've found says this should do it. The only other thing it could be was from the Shorwall FAQ under general port forwarding questions. It states that the target machine may not know its gateway. I'm not sure how to check this but it is set up at startup by init scripts & dhcp and I don't really think that's it.

Any insight on why these requests would be getting lost between the FW and the Workstation? Any tools to test with or files to check? I really am going batty here.

Thanks in advance.
C