A lot of people are having problems with setting up a server running behind a firewall.
Vietcong and DirectPlay port settings:
UDP packets:
5425-5440, 5725-5740, 5555, 6500, 6515, 6667, 6073, 3783, 13139, 2300-2400, 15420-15440, 27900 and 28900.
TCP packets:
27900, 28900, 29900-29901, 5425-5450, 2300-2400, 5555, 6500, 6515, 6667, 3783 and 15425-15430.
Specific settings apply to your firewall/NATD software. If you encounter any problems seeing your server behind a firewall, check the above ports first
( you have to remap all these ports to point to the game server in the inner network)
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