I understand you're looking for a detailed post about IGI 2: Covert Strike multiplayer servers. However, I need to provide an important clarification first:
Would you like detailed setup instructions for any specific method (OpenSpy, Radmin, or direct IP)? igi 2 multiplayer servers list
after GameSpy (the matchmaking service) closed in 2014. There is no official master server list anymore. I understand you're looking for a detailed post