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Hussein Nasser: We now know why the DNS failed

TL;DR

We finally got the root-cause breakdown of AWS’s October 19, 2025 DNS mega-outage—Dynamo lost its DNS, which cascaded into EC2 hiccups and Network Load Balancer failures. The author even timestamps the deep dive: 0:00 for the overview, 5:30 on the DNS meltdown, 13:41 for EC2 errors and 16:16 on NLB issues.

On top of that, Hussein drops a treasure trove of learning links—OS basics, Node.js internals, backend and networking courses, database deep dives, plus YouTube memberships and affiliate perks to level up your cloud-ops game.

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