I have FINALLY got webmin up and running and my linux box running as a router, it took awhile but its good.

However i'm having a problem with azareus telling me that my TCP/UDP port 6881 is being blocked, which it probably is. I don't have a lot of iptables know how but I'd like to get this working.

How do I just upon the port on my router to allow this connection?

There are two ways to do this, depending on your router setup.
You either have one of the two scenarios:
1. You're using Azareus on the router itself.
2. You're using Azareus on a machine behind the router on your lan.

Option 1:
If you're using Azareus on the router box, then you'll want to use the INPUT chain, which will work on packets destined for the linux router itself, and not for a machine behind the router.

You could do:
iptables -A INPUT -p tcp --dport 6881 -j ACCEPT
iptables -A INPUT -p udp --dport 6881 -j ACCEPT

This will work if no previous rule would block it out, such as a catch-all rule that drops everything.

If there is a catch-all rule, and you append (-A) this rule to it, it will still fail. In that case, you can do:

iptables -I INPUT -p tcp --dport 6881 -j ACCEPT
iptables -I INPUT -p udp --dport 6881 -j ACCEPT

Option 2:
If you have a machine behind the router, and not the router itself, and would like to forward all incoming connections on that port to that machine, then do the following.
Let's say the private ip address of the machine behind the router (the one you're running Azareus on) is 192.168.0.101:
Then you would do:
iptables -t nat -A PREROUTING -p tcp --dport 6881 -j DNAT --to-destination 192.168.0.101
iptables -t nat -A PREROUTING -p udp --dport 6881 -j DNAT --to-destination 192.168.0.101

Hope that helps.

Pablo

well it does help in the sense that it tells me how to do port forwarding to a specific port

i have method 2 :P -- 2 computers behind the router, each have azareus, do i have to set them up on different ports? or can i simply just open the udp/idp ports so they're available to each computer