I use a MacBook Pro running 10.5.8 and started receiving these notices yesterday -- now received my 5th - and they started coming IMMEDIATELY following a visit to Mackeepers and running their free clean your Mac. I should have read their forum posts first .. but that site, I am SURE, is one source. I can count downloads I've ever made on one hand -- the last 4 months ago was CS5 trial software -- so I dont download randomly. For those of you capable of figuring this out, the "attack name" has always been Portscan but the IP address in the warnings change.
My question is what to do with them? One option says "configure vunerability protection" that could be good or bad since it could configure to "undo" the 'protection' OR the vunerability 'block' and I know nothing. Another option is to continue by clicking 'next' but decided to search on line first and found you. Another option is just to close the window and act like it never happened. At a minimum, I felt my confidence it came from Mackeepers should be reported. What is the safest way to handle the Norton Notification?