US internet repeatedly disrupted by attacks

LONDON (AP) — Cyberattacks on a key internet firm repeatedly disrupted the availability of popular websites across the United States Friday, according to analysts and company officials. The White House described the disruption as malicious.

Manchester, New Hampshire-based Dyn Inc. said its server infrastructure was hit by distributed denial-of-service attacks, which work by overwhelming targeted machines with junk data traffic. The attack had knock-on effects for users trying to access popular websites from across America and even in Europe. Among the sites apparently affected were Twitter, Netflix, and Sony’s PlayStation Network.

The level of disruption was difficult to gauge, but Dyn provides internet traffic management and optimization services to some of the biggest names on the web, including Twitter, Netflix and Visa. Critically, Dyn provides domain name services, which translate the human-readable addresses such as “twitter.com” into an online route for browsers and applications.

Steve Grobman, chief technology officer at Intel Security, compared an outage at a domain name services company to tearing up a map or turning off GPS before driving to the department store. “It doesn’t matter that the store is fully open or operational if you have no idea how to get there,” he said in a telephone interview.

Jason Read, founder of the internet performance monitoring firm CloudHarmony, owned by Gartner Inc., said his company tracked a half-hour-long disruption early Friday in which roughly one in two end users would have found it impossible to access various websites from the East Coast. A second attack later in the day caused disruption to the East and West Coasts as well as impacting some users in Europe.

“It’s been pretty busy for those guys,” Read said. “We’ve been monitoring Dyn for years and this is by far the worst outage event that we’ve observed.”

Read said Dyn provides services to some 6 percent of America’s Fortune 500 companies. That means a lot of disruption.

“It impacted quite a few users,” he said of the morning’s attack.

A full list of affected companies wasn’t immediately available, but major sites including Twitter and coder hangout Github said they briefly experienced problems earlier Friday.

For James Norton, the former deputy secretary at the Department of Homeland Security who now teaches on cybersecurity policy at Johns Hopkins University, the incident was an example of how attacks on key junctures in the network can yield massive disruption.