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[dns-wg] Authoritative DNS service degradation 2024-04-15

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Martin Pels (RIPE NCC) mpels at ripe.net
Tue Apr 16 11:44:22 CEST 2024

Dear colleagues,

Yesterday at 09:15 UTC an unscheduled software update was rolled out on 
several of our Hosted DNS instances. This update applied an incorrect 
routing daemon configuration. Due to the incorrect configuration, DNS 
requests received by these DNS instances could no longer be answered. 
This affected 8 of our 20 Authoritative DNS sites.

At 14:03 UTC the cause of the incident was identified, and anycast BGP 
announcements for the affected instances were withdrawn, redirecting 
traffic to other locations. This was completed at 14:15 UTC.

We re-applied the correct routing configurations on all affected 
servers, and restored BGP announcements at 09:00 UTC today. Furthermore, 
we have applied measures to prevent automatic updates of the routing 
daemon software on all of our DNS servers.

Kind regards,
Martin Pels
RIPE NCC

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