I'm having trouble getting around the firewall on my computer, which is an iMac running tiger.

Under LimeWire > Preferences > Advanced > Firewall config, it says Listen on Port: 50526. I have that, but what does that mean? when I go to Preferences > sharing and try to configure my firewall, it asks for a TCP AND a UDP port number, plus a description.

what do I do?? where does this other number come from? any help is greatly appreciated.