WASHINGTON, May 1 (UPI) -- Attacks on the Internet infrastructure are on the rise, security experts say.
The Washington Post reported Friday "distributed denial of service" attacks use robot networks to flood their targets with so much junk online traffic that they can't accommodate legitimate visitors.
The newspaper noted the attacks have been a common threat since the commercial Internet emerged, but the number and sophistication of attacks has increased, observers say.
"We've certainly seen in last 120 days an uptick in critical infrastructure impacting attacks," said Danny McPherson, chief security officer at Arbor Networks. "Suffice it to say, 'interesting' activity in this area has indeed increased from our perspective over the past 6 months or so, and the virulence of infrastructure attacks continues to be evident."
In March, for instance, unknown hackers hit the Web site GoGrid.com, disrupting service to roughly half of its 1,000 customers.