So I think I'm finally stepping up to broadband with a cable modem from Earthlink. Since this is a constant "on" connection and I don't wanna get hacked, can anyone tell me if it's enough to just have file sharing turned off, or do I need some kind of personal firewall? I'll be running 9.2 on this machine until protools comes out. Then X. Is there any difference in the need (or lack of need) for security between the two? Big thanks for any thoughts.