Virus scan - always virus scan your downloads, we have tested it with AVG and a few others and no problems encountered with its use - one player reported that his Virus scanner (think it was Avast ) reported a virus, but from my own checking I think this is due to the ports it opens to transfer the scan info to server.
Firewalls - You will be prompted by your operating system to allow the program - again this is because of the ports it opens.
Versions -: these are the versions we are running that work together.
Server side -: server watch 0.941 ALPHA
User Anticheat client - 0.81 beta
User client viewer - 0.74
Hi not used Panda before - I am using AVG free and that does not detect it as a virus.