WORKAROUND SOLUTION that worked for some: see Nr.26Ģ. Sometimes just a simple "Take the power plug from router out and put it back in" does the trick. Ports UDP: 1500, 3005, 3101, 28960 and TCP: 27015 (SRCDS Rcon port).Īdditionally the Steam client transmits and receives network traffic on : ( - info for most routers and how to)Ĭall of Duty: Modern Warfare 2 transmits and receives network traffic on : Go to the last tab Windows Firewall > add the following ports : Solution : Go to Network connections on your PC > Right mouse click on your connection.
So it is trial and error till you find what works for you.