it was really just a joke to talk shit about TOXIC ICE. to reply seriously to your question: only cheating and modding can lead to a ban, anything that is within the game (such as betrayal and chat) is not really a bannable offence
try setting the WAN_IP setting to the ip address found on http://www.whatsmyip.com - it may be that the tool filled in the 0.0.0.0 setting (which would make your game unjoinable). this needs to be done on every pc on your network
(1) the ip address in the router config needs to be set to YOUR local ip address (found by typing "ipconfig" in the command prompt)
(2) you have selected the TCP protocol; it needs to be the UDP protocol
(3) if you want people on your network to be able to join you need to open halo2config1.ini...
this is sort of it:
(1) first you need to determine how many players you want. (2) make a number of accounts equal to the number of players (3) you need to determine which players will play with a controller and which player with mouse and keyboard (if there is one) (4) start halo2 multiple...