DNS error results in Swedish top-level domain paralysis

Beijing time October 14 morning news, according to foreign media reports, local time Monday night, Sweden's top-level domain name. The daily maintenance of SE is seriously wrong, causing the lookup of all. se domain names to fail. The cyber paralysis has almost paralyzed the entire Swedish Internet.　　All. SE sites are inaccessible and e-mail messages cannot be sent to an email service provider under this domain name. According to sources, the. SE area (. SE Zone, the core record of the. SE top-level domain) was faulted at 9:45 P.M. local time and resumed normal at 10:43 that night. However, since DNS lookup (DNS lookup) is stored in an external buffer by both the ISP (Internet service provider) and the network hosting company, the problem continues after this. Until 11:30 P.M. local time, the main Swedish ISPs cleaned their DNS buffers, indicating that they had purged the corrupted results so that the new DNS lookup would work correctly.　　If this is not done, the failure will need to wait for a full 24 hours to resolve. But there are still a number of smaller ISPs that have not addressed the issue.　　ISPs outside Sweden may still not be aware of the problem, so the failure is likely to continue.　　Problem reason this fault occurs in the daily maintenance of the. se domain name. The SE Registry (www.iis.se) uses the wrong configuration script to upgrade. SE zones, causing errors in all. se domain names. Many in the industry revealed that the script failed to add a terminator to the DNS records in the. SE zone when the data was upgraded. ”。 However, you must use this terminator if you want DNS to understand that ". Se" is a top-level domain.　　Although no details are currently available, this error can indeed cause the entire DNS lookup chain to fail. Worse, DNS lookups are stored in an external buffer.　　Because DNS lookups are cached at a specific time and the. SE Zone has a full 24-hour lifetime (time-to-live), this failure of some users lasts up to 24 hours. To quickly resolve this problem, you need to "clean" the buffer of the external DNS server, such as emptying the buffer.　　However, only the controlling side of the DNS server, usually the ISP or network hosting company, can take this action, and the end user cannot control the situation and can only rely entirely on the ISP. Pingdom, a Swedish IT services company, monitors the health of tens of thousands of sites around the world, saying that there are frequent web sites that are down because of DNS problems, and that global problems are widespread.　　However, this problem is usually caused by an incorrect configuration of a single domain name or by a DNS server failure of a network managed service, and the total paralysis of a top-level domain is extremely rare. This problem affects the overall area of a top-level domain, and all. Se domain names are affected. The current. SE domain name is over 900,000, all of which are affected by this DNS failure. Pingdom said that if the same thing happened to the. com domain name, there would be more than 80 million domain names affected. By then, the entire Internet will have an unprecedented scale of downtime. (PEI)