http://www3.limewire.com:6346/
This port test will tell you if the default port (6346) is blocked.

Here's some info on alternative ports
http://www.gnutellaforums.com/showth...274#post189274

Check out LOTR's 3rd post for how to change the ports. Just make sure the listening port & manual port are the same & remember to apply.

Good luck