I am having trouble connecting to an online game using GAMESPY can anyone tell me what the trick to it is?

I have attempted to connect to an online game of Metal of Honor Allied Assault but can never get connected using Gamespy. I am not sure about how to get Norton Antivirus to allow the connection...

Yes, thats a firewall issue. You need to turn off norton and its firewall if you want to play on Gamespy. Gamespy is a game client that has all these action interactive games. Its very sensitive to norton's firewall.

If you are behind a firewall/proxy and are able to change its settings, Arcade needs the following TCP ports open in order to function:

6667 (IRC)

3783 (Voice Chat Port)

27900 (Master Server UDP Heartbeat)

28900 (Master Server List Request)

29900 (GP Connection Manager)

29901 (GP Search Manager)

13139 (Custom UDP Pings)

6515 (Dplay UDP)

6500 (Query Port)

Go to this website on Gamespy and read about how you can allow those ports to enter your firewall:

http://www.gamespyarcade.com/support/firewalls.shtml