We Now Know Why the DNS Failed

Turns out the October 19, 2025 AWS outage that dragged on for over a day was finally unraveled in a root-cause report 10 days later. The breakdown points to Dynamo losing its DNS entries, followed by a cascade of EC2 errors and Network Load Balancer hiccups.

If you want the full deep dive, check AWS’s official RCA—then, if you’re craving more backend know-how, Hussein Nasser’s channel and accompanying courses cover everything from OS and Node.js internals to networking, databases, NGINX and Python, plus troubleshooting tips and podcast episodes.

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