I am developing an applet for browser-to-browser application where User A knows User B's IP, requests connection through a port, and User B responds the request.
The main problem is that both users are behind a NAT, so just with the IP and the port is not possible to connect.
Which options do I have to solve this problem without forcing users to change their NAT configuration?
THANKS!
It is called TURN and STUN NAT traversal implementations. You may want to learn about JXTA or read the Practical JXTA II book online at Scribd for more information.