.CN Domain Service Restored Following Massive DDoS Attack

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Service to China’s .cn domain was restored Sunday morning following a DDoS attack that knocked approximately one-third of websites registered to the domain offline, according to a report by Threatpost.

The incident is just the latest in a series of large DDoS attacks this year, which have mainly targeted banks and other financial institutions in the United States.

A recent Arbor Networks report found that nearly half of DDoS attacks in the first half of 2013 are now larger than 1Gbps, an increase from 13.5 percent in 2012.

The China Internet Network Information Center said in a statement that the outage was triggered by the biggest DDoS attack China has ever been hit with.

The organization also apologized to its users for the slow and interrupted access to the Internet, adding that it currently has DNS security specific contingency plans in place.

The CINIC criticized the attack, which started around 4 a.m. UTC, only to worsen two hours later. The origins of the attack has still not been identified.

A report by the Wall Street Journal quoted web security provider CloudFlare as saying that the attack targeted a .CN registry, and that during the peak of the attack, traffic to thousands of .CN domains significantly decreased by more than 30 percent over the previous 24 hours.

Cloudflare CEO Matthew Prince told Threatpost that the “attacker likely found a bottleneck in the registry infrastructure [and] overwhelmed it with traffic to make it unavailable”. The DDoS attacks lasted up to four hours prior to being mitigated, said Prince.

Arbor Networks director of research Dan Holden said that its research team also monitored the DDoS attacks and saw a 400 percent increase over average traffic.

Last month, Network Solutions have been experiencing more access problems, following DDoS attacks against Network Solutions’ servers.

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