DNS server causes multiple network failures 4 hours after emergency repair

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The ministry's website today issued a circular explaining the reasons for the failure of Internet users in 5 provinces such as Jiangsu, Hebei, Shanxi, Guangxi and Zhejiang from 21 o'clock May 19. According to the circular, this network failure has been repaired on 20th 1:20 A.M., a total of 4 hours of time, in the cause, the circular said, mainly because of the storm audio and video web site domain name resolution system by network attacks, resulting in the operator recursive domain name resolution server blocking, resulting in users can not normal Internet.

Ministry: Emergency response first time repair

May 19 22 O'Clock, the Ministry of Industry and Information Technology received a report from the telecom operators, since 21 o'clock, Jiangsu, Hebei, Shanxi, Guangxi, Zhejiang and other provinces have been the Internet network failure, some of the days of gay community users of the service was affected. The Ministry of Industry and Information technology attaches great importance to this, requiring telecom operators to identify the causes of failure, take effective measures in time, and resume normal service as soon as possible. As at 1:20 A.M. 20th, Internet services in the affected areas are basically back to normal.

20th, the Ministry of Industry and Information technology organization related units and experts held a judgment meeting to analyze the causes of failure. The meeting thought, because the baofeng.com website domain name resolution system is attacked by the network attack to have the breakdown, causes the telecommunication Operation Enterprise's recursive domain name Analysis Server to receive the massive unusual request to cause the congestion, causes the user not to be able to surf the net normally.

The Ministry of Industry and Information technology requires all telecom operators to do a good job of user interpretation. Analogy, eliminate hidden dangers and prevent similar situations from happening. Further strengthen the network security monitoring and early warning and communication work, improve the contingency plan to ensure the safe operation of the network.

China Telecom: Users to notify the speed of slow down immediately screen failure URL

China Telecom yesterday to the Tencent technology to explain that, because of the storm audio and video site's own domain name resolution failure, resulting in China Telecom DNS server traffic suddenly increased, network processing performance declined. May 19 21:50, there are Jiangsu, Anhui, Guangxi, Hainan, Gansu, Zhejiang and other six provinces users to visit the Web site speed slow or inaccessible.

According to the introduction, China Telecom received user declaration, immediately shielding the affected provinces exist resolution of the network address, to May 19 22:40, China Telecom all the provincial DNS services back to normal, the network has been completely unobstructed.

China Telecom said that in the future will do a better job of network monitoring, found that abnormal situation in time to deal with, minimize the impact on users, to protect users to enjoy the smooth network services.

Storm Video: The DNS server is the source

May 20 afternoon, the Storm audio and video also to Tencent Technology issued a statement that yesterday, Jiangsu, Anhui, Guangxi, Hainan, Gansu, Zhejiang and other six provinces users "visit the Web site slow or inaccessible" fault, has returned to normal, and the cause of the accident is DNS domain name resolution. It said that the storm is also one of the victims, and pledged to China Telecom, Unicom and other operators, to strengthen the technical level of communication and cooperation to build a safe and smooth internet environment.

Storm audio and video CEO Fengxin says it will back up the domain name servers, avoid similar problems, increase security considerations on the software's internet mechanism, and storm technology will work overtime to finish the job within three days.