How Cloudflare auto-mitigated a world record 3.8 Tbps DDoS attack
Oct 2, 2024Manish Arora, Shawn Bohrer, Omer Yoachimik, Cody Doucette, Alex Forster, Nick Wood
Summary
This post details Cloudflare's autonomous mitigation of a world-record 3.8 Tbps DDoS attack. It explains the anatomy of L3/4 DDoS attacks, focusing on CPU cycle and network bandwidth exhaustion. It highlights how Cloudflare's global anycast network distributes attack traffic, and how real-time dynamic signatures are generated to match attack traffic. The post also describes the use of kernel features to drop packets at wire-speed for efficient mitigation.
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