Chaotic42
Lifer
I have a decent setup and I'm a terrible host. Same for my friend. After doing some research, I found a bunch of ports that we needed to open. I was just the host of a ground war and it ran pretty well. Normally everyone would have red pings.
From http://forums.modernwarfare247.com/index.php?/topic/12033-mw2-networking-101:
UDP 27000 to 27015 inclusive (Game client traffic)
UDP 27015 to 27030 inclusive (Typically Matchmaking and HLTV)
TCP 27014 to 27050 inclusive (Steam downloads)
UDP 4380 Dedicated or Listen Servers
TCP 27015 (SRCDS Rcon port) Additional Ports for Call of Duty: Modern Warfare 2 Multiplayer
UDP 1500
UDP 3005
UDP 3101
UDP 28960
Enjoy.
From http://forums.modernwarfare247.com/index.php?/topic/12033-mw2-networking-101:
UDP 27000 to 27015 inclusive (Game client traffic)
UDP 27015 to 27030 inclusive (Typically Matchmaking and HLTV)
TCP 27014 to 27050 inclusive (Steam downloads)
UDP 4380 Dedicated or Listen Servers
TCP 27015 (SRCDS Rcon port) Additional Ports for Call of Duty: Modern Warfare 2 Multiplayer
UDP 1500
UDP 3005
UDP 3101
UDP 28960
Enjoy.
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