Took me a while to trace my problem in battlefield 2 bad company to this. Basically - Eset Smart Security started blocking in-game browser updates, even though i added every possible exception for the game. So i checked logs and found this line appearing whenever i try to update browser window: Detected covert channel exploit (ICMP protocol) With my current IP address in source tab and several server addresses in target tab. I have tried allowing IMCP communication specifically for the game and in general but it didn't help. So the only way around it is to disable filtering completely - then everything works fine. So how else can i prevent eset from blocking connections for my game? And yes - firewall modules are updated. Read every post about this issue on this forum Setup->Personal Firewall->IDS and Advanced Options->uncheck Covert data in ICMP protocol detection Still - is there a way to disable that thing specifically in one particular application?