We now know why the DNS failed

Hussein Nasser unpacks AWS’s October 19, 2025 outage, walking through exactly what torpedoed the DNS— from DynamoDB losing its DNS records to EC2 hiccups and Network Load Balancer glitches—before pointing you to the official RCA on AWS’s site.

Along the way he peppers in a treasure trove of backend-y goodies: courses on operating systems, Node.js, networking, databases, NGINX, Python, plus his Medium writings, podcast and YouTube membership perks for anyone looking to level up their backend game.

Watch on YouTube