Not sure what is going on here...installed NIS (Comcast))...everything enabled at default settings, but web access appears to be completely blocked in both Firefox (4.0.1) and Safari (5.05). I tracked this down to the vulnerability protection in Norton Confidential. Everything works fine if I disable the protection. I have all the latest updates installed...am running OS 10.6.5. Any ideas?....Sorry if this has been posted previously....thanks.