You don\'t need port forwarding, if that\'s what you\'re worried about. In fact, I don\'t think a firewall would be an issue, really. If you have something equivalent to the PC \"ZoneAlarm,\" that might do it... Do you have any particular connection-blocking software?
P.S. To turn off the software firewall, open System Preferences (from the Apple Menu), go to the \"Sharing\" preference pane, and then the \"Firewall\" tab. Click the \"Stop\" button.