We now know that on October 19, 2025 AWS went down for over a day, and ten days later the root-cause analysis revealed it all boiled down to a DNS failure triggered by Dynamo’s DNS going AWOL, compounded by EC2 and Network Load Balancer errors. The video timestamps walk you through a quick summary, a deep dive into how Dynamo lost its DNS, then the EC2 and NLB snafus that made things worse.
If you want the full RCA straight from AWS, it’s linked in the description, along with a treasure trove of Hussein Nasser’s courses and resources—everything from OS fundamentals and Node.js internals to backend, networking, database engineering, NGINX, Python, plus access to his podcast, YouTube membership perks, and more.
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