I can connect to the internet, but no servers appear on any Steam game I try to play

I am running this off BOOTCAMP in Windows 7* Let me start by saying this, I don't know of any other good communty sites to ask, I figured the knowledge would be here.

Internet works, but when I try to play a game like Rust or DayZ through Steam, the server lists are blank -- there's nothing to select. I'm wondering if maybe it's an internet or firewall setting?