What are the ports for L4D ? ( Steam General )

31 March 2009

Hi guys, there are the ports used by Left4Dead and any Steam game , if you’ve got any problem to connect to the server, or, when hosting, nobody can join you, open these ports into you firewall and/or router :

UDP Ports : From 27000 To 27020 inclusive
TCP Ports : From 27020 To 27050 inclusive

For the Dedicated or Listen Servers, open the TCP 27015 (SRCDS Rcon port).  Port fowarding help for routers.

Source : Garena Forums.


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