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How to send Datagram packet to another network without port forwarding?

 
Greenhorn
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I want to make a client server chat program in java and I have successfully made it but my program only works when both PCs are connected with the same network.

Client.java


Server.java


I want my program to work on different networks also and I want it without port forwarding.

Please help me Out!!!

 
Saloon Keeper
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Then you need to run your communication through a service on the internet such as a proxy or a VPN provider, or you need to host your server on a machine that's directly connected to the internet.
 
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