AWS October 19, 2025 Outage – TL;DR
AWS went down for over a day when Dynamo lost its DNS entries, triggering a cascade of EC2 and Network Load Balancer errors. The full post-mortem lands at aws.amazon.com/message/101925, and a video walkthrough breaks it down at 0:00 (summary), 5:30 (DNS root cause), 13:41 (EC2), and 16:16 (NLB).
Bonus Resources
Hussein Nasser sprinkles in links to his backend, networking, Python, NGINX and database courses, plus his YouTube channel, podcast and other goodies if you’re looking to level up your systems skills.
Watch on YouTube
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