We have a LAN made up of multiple computers connected via Wifi and we use to play CS on this LAN, there is a proxy server (SQUID) between us and internet.
We are unable to play CS multiplayer any more now. Have they blocked the ports with proxy server? If so what can we do? Search for open ports http://superuser.com/questions/421030/find-ports-not-blocked-by-proxy-server ?