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I need to send a file from computer to computer in Java. I do it in a local network with a server/client model. But is it possible to do that over wide area network?

Clients might under the NAT. I send manually the external address and internal address which one is the receiver of the file (server) to the who sends the file (client).

Peter Mortensen
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user2155726
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    if two computers are behind firewall/NAT the only way to establish a connection is to use some third party server – Oleg Mikheev Mar 11 '13 at 07:00

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