Wrong script has disconnected the .SE domain from the Internet

More than 900,000 domains in the Swedish national zone .SE went offline for almost two hours. Sites were not available, mail to Swedish addresses did not reach the recipients. The incident happened on the evening of October 12 and became another example of how fragile the actual infrastructure of the modern Internet is.

A detailed chronicle of events can be recovered from the messages of Swedish hosting providers, who first raised the alarm. According to their information, the Swedish domain disconnected from the Network at 21:45 local time, and recovered at 22:43, but the caches with DNS tables from the providers were updated only by 23:30, and from smaller providers - and that later. That is, the national domain was completely unavailable for almost two hours, and for some users even longer.

As it turned out soon, the damage to the DNS tables occurred during a planned update of the registry, which was made by the coordinating company of the .SE domain . For the update, they used an incorrectly configured script that spoiled all entries in the registry without exception (specifically, at the end of each entry the necessary point was missing). At 21:45, they sent out a file with a corrupted registry to all providers, they updated the databases, and an instant blackout occurred.
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It is terrible to imagine if such a friend happens to the .com zone, which includes more than 80 million domain names.