TL;DR

They finally dropped the full RCA for the October 19 2025 AWS outage—over 24 hours of downtime boiled down to a DNS failure in Dynamo that cascaded into EC2 and Network Load Balancer errors. Key video chapters walk you through the summary (0:00), Dynamo’s DNS meltdown (5:30), EC2 glitches (13:41) and NLB failures (16:16).

Hussein also peppers the post with links to his courses and resources on OS fundamentals, Node.js, backend troubleshooting, networking, databases, NGINX, Python, plus invites you to join his Medium, YouTube membership, podcast and more.

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