Chinese ccTLD operator CNNIC suffered up to half a day of degraded performance and intermittent accessibility yesterday, after being hit by what it called its “largest ever” denial of service attack.
CNNIC is one of ICANN’s three Emergency Back-End Registry Operators, contracted to take over the running of any new gTLD registries that fail. It’s also the named back-end for seven new gTLD applications.
According to an announcement on its web site, as well as local reports and tips to DI, the first wave of DDoS hit it at about midnight yesterday. A second wave followed up at 4am local time and lasted up to six hours.
According to a tipster, all five of .cn’s name servers were inaccessible in China during the attack.
Local reports (translated) say that many Chinese web sites were also inaccessible to many users, but the full scale of the problem doesn’t seem to be clear yet.
China’s .cn is the fourth-largest ccTLD, with close to 10 million domains under management.