"We haven't seen anything out of the ordinary," said Chris Rouland of Atlanta-based Internet Security Systems Inc., which sells protective software to thousands of companies. "We're paying attention to any sites that may go down."
A spokeswoman for Microsoft Corp. in Redmond, Washington, told The Associated Press that there was no immediate sign of an Internet attack.
Officials had "no sense" where the attack attempts were coming from, but Olson said there is no indication that any terrorist group has so far attempted an Internet attack.
On September 18, the Critical Infrastructure Protection Board will be putting out a national strategy to secure cyberspace, to protect against Internet attacks, Olson said.
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