Server-client connection in a chat program - problem

Question

My problem shortly: there is a chat program. The code was in a book, so I think it must be OK. When I run the server and client on the same computer it works. But when I try to start the client program on other computer (the server is already running), this one don't comunicate with the server. What should I do or what do I do wrong? Any suggestion?

Answer 1

Check out the port address and let me know how you connected two computers.

Answer 2

surely client is using different port

Answer 3

Could be a firewall problem. Check it without firewall turned on to see.