punisher wrote:
You can enter an IP in bittornado advanced prefs, but you only need this if, for example, you're running a tracker and the client on the same machine and you want to connect to the tracker with your external IP rather than your LAN IP.
Actually, even in this case, you still don't need to specify the IP as long as you use your external IP/hostname as the tracker URL in the torrent file, the tracker program will see the incoming connection as your external IP and not your LAN IP which works provided that a person's router supports loopback connections using their external IP (some routers don't).