Java Sockets and the Internet

Question

I created a small chat program that works flawlessly when the client and server are running on the same computer (and possibly also on the network). However, as soon as I try to connect to another computer via the Internet, the socket connection simply expires. Is it because of firewalls / routers, etc.?

And how can I connect ServerSocket and Socket over the Internet?

Answer 1

However, as soon as I try to connect to another computer via the Internet, the socket connection simply expires. Is it because of firewalls / routers, etc.?

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Answer 2

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Answer 3

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Answer 4

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