From a wired computer open setup page of router by typing http://192.168.1.1 in browser's address bar, and typing password as "admin" and no user name, if admin doesn't work then try some of your own password. Goto application and gaming tab, and make port forwarding entries. The target IP should be IP address of device for which ports have to be forwarded. The device have to have a static IP address for port forwarding. Ports can be found at: http://portforward.com/cportsnotes/battlenet/battlenet.htm
