Cyberattacks From Western Europe Lack Punch

So far, so good. There has been little evidence of a denial-of-service attack on U.S. sites warned about earlier this week by the FBI. The bureau's National Infrastructure Protection Center issued an advisory asking ISP and Web-site administrators to "heighten their awareness of network traffic" through Tuesday.

The government issued the warning after receiving intelligence reports from European authorities indicating that a denial-of-service attack against U.S. sites and ISPs was likely.

An administrator at an ISP on the East Coast, who requested to not be identified, said there was a noticeable "bump" in network traffic early Tuesday morning. "Were we under attack? It's hard to say. If so, it wasn't effective," he says.

Security firms Symantec Corp. and SecurityFocus (which was recently acquired by Symantec) say they haven't noticed "any suspicious activities." Amit Yoran, co-founder and CEO of Riptech Inc., a managed security services firm, says that as of mid-Tuesday afternoon the company hadn't spotting any significant attack activity and no increase in attack activity from Western Europe.

Keynote Systems Inc., which tracks Internet latency at its Internet Health Report, shows relatively healthy Internet performance during the past 24 hours.