Tencent large areas cannot access failure occurs
admin5 webmasters network latest news: SINA technology hearing May 30 messages , Tencent network access failure emergency around 18 o'clock today, national does not open as much of their related pages. Preliminary analysis for the DNS server problem.
around 18 o'clock in the afternoon today, Tencent all pages are coming on user reaction could not be opened. SINA technology found in the subsequent investigation, including Beijing, Shanghai, this exception occurs with much of the country. However, Tencent Software Center (PC.QQ.com), QQ mailbox, Qzone and search are not affected.
in response, Tencent official in an interview with Sina technology when the line does not give a positive response.
those in technical analysis, view current Tencent domain name resolution (DNS) server, you can find QQ.com is pointing to its own domain name, not resolve to any IP address. The analysis said, caused this situation involves staff operating errors, hacking, and so a variety of situations. (Shu Shi)
DNS background:
host is the IP address identifies the network, and only know the IP address of a site to achieve access. But because of the bad IP addresses, memory, so the domain name only occurs (for example, SINA.com.CN). Usually when users on the Internet, DNS server automatically adds a domain name resolves to the IP address of the server.
when an error occurs when the resolution, you cannot complete the domain name to IP address conversion, users will not be able to access a site by domain name.
After the complete failure lasted about 40 minutes, started there are mitigating circumstances. However, to closing the country still has more than one place have not yet returned to normal access.
when the accepted Sina science and technology connections, Tencent official response, “ access exceptions in some areas due to network fluctuations &rdquo.
these so-called network fluctuation problems, is implied and operators concerned. But at the same time, there was no other site wide access exception conditions. Also analysis of the above associated with domain name resolution failures.
pointed out that that earlier technology, view current Tencent domain name resolution (DNS) server, you can find the DNS cannot resolve. The analysis said, caused this situation involves staff operating errors, hacking, and so a variety of situations. (Shu Shi)
