Might be a silly question, but I used the Shields Up program today to see what ports are open or not with Mountain Lion 10.8.4, its included firewall program set to Stealth, plus my brand new Airport Extreme ac version, and this below is what I'm getting. Anyone in the know thinks this is OK, or is the Shields Up Program not worth it. Most are closed and a few are Stealth. Thought they would all be Stealth