AWS’s October 19, 2025 DNS Meltdown Explained

AWS just dropped its long-awaited root cause analysis for the epic 24-hour outage: a domino effect kicked off by a DynamoDB DNS misconfiguration, which then tripped up the EC2 control plane and finally the Network Load Balancer. The video breaks it down at 0:00 (overview), 5:30 (Dynamo DNS), 13:41 (EC2 errors) and 16:16 (NLB failures)—and the official RCA is linked straight from AWS.

Beyond the outage drama, host Hussein Nasser peppers in links to his treasure trove of backend goodies: OS & networking fundamentals, Node.js internals, database deep-dives, NGINX and Python courses, plus his podcast, Medium posts, YouTube membership perks and even a “buy me a coffee” option if you’re feeling extra generous.

Watch on YouTube