During the early testing phase in 2002, some information was revealed about the program via the Half-Life Dedicated Server mailing lists. It can detect versions of "OGC's OpenGl Hack", can detect OpenGL cheats, and also detects CD key changers as cheats. Information on detected cheaters is sent to the ban list server on IP address 205.158.143.67 on port 27013, which was later changed to 27011. There is also a "master ban list" server. RAM/hardware errors detected by VAC may kick the player from the server, but not ban them.