Tencent network large area inaccessible failure
webmaster network Admin5 latest news: sina science and technology news on May 30th afternoon news, Tencent today around 18 sudden visit to the fault, the country can not normally open its relevant pages. Preliminary analysis for DNS server problems.
today around 18 p.m., the user has been able to respond to all the pages of Tencent network can not open. Sina science and technology in the subsequent investigation found that, including Beijing, Shanghai, including the country have appeared in this unusual situation. However, Tencent Software Center (pc.qq.com), QQ, Qzone and email soso was not affected.
this, Tencent official in accepting sina technology connection, did not give a positive response.
technical analysts said, the current view Tencent.com DNS server (DNS), can be found in qq.com is to point its own domain name, not parsed to any IP address. The source analysis, the cause of this situation involves staff operating errors, such as a variety of hacker attacks. (Shu Shi)
domain name background knowledge:
network hosts are IP address identification, and only know the IP address of a site can be accessed. However, because the IP address is not good memory, so the domain name (such as sina.com.cn). Usually when the user access to the Internet, the domain name resolution server will automatically be a domain name, interpreted as the corresponding server IP address.
when parsing an error, you can not complete the domain name to the IP address conversion, users can not access a site through the domain name.
the whole failure lasted about 40 minutes after the start of the emergence of remission. However, to the time of the country there are still many places have not yet returned to normal access.
in connection with the acceptance of sina technology, Tencent official responded that, due to network fluctuations caused by abnormal access in some areas".
above the so-called network fluctuations, is implied with the operator. But at the same time, there is no access to a wide range of other sites. There are also analysis of the above and domain name analysis of failure.
had earlier pointed out that the technical view, the view of the current Tencent network domain name analysis (DNS) server, you can find its DNS can not be resolved. The source analysis, the cause of this situation involves staff operating errors, such as a variety of hacker attacks. (Shu Shi)