"crossfire mfc app is trying to act as server"

last time when i played CF i got the message "CROSSFIRE MFC APP IS TRYING TO ACT AS SERVER" form my firewall...
i decided to DENY cf acting as a server but i can play of course...
why in gods name does cf want to act as server?!

also i noticed that whwn my IE is in offline mode CF wants to connect to internet... i deny but i can still play...

what is that all?! r u gonna get u guys to spy on ur users?
thats the only valid explaination i can provide cause it works even if i deny....

pls explain otherwise ppl will think in a bad way of these suspicious behavior....