Getting server to work from within a LAN?

[clintonio]

Hey. I used to have a nice simple set up (No router, just a modem) but now I have a LAN and Bt Home Hub.

I know the
"-IP xxx.xxx.xxx.xxx" command and the "-port xxxxx" command. But I still get "Cannot allocate UDP port" when I start the server.

I know I can either do:
Port forwarding
DMZ

I currently have no firewall because I have realised that at current I don't need one. But I will soon.

My Home Hub has no firewall because I decided it doesn't need one either.

Does anyone know how to do a DMZ on a BT Home Hub router or port forward on it too?