Cloudflare Blocks Record-Breaking 11.5 Tbps DDoS Attack

Part of a wave of DDoS attacks that lasted for weeks, the assault was a UDP flood mainly originating from Google Cloud.

Cloudflare on Monday said it blocked the largest distributed denial-of-service (DDoS) attack ever recorded, at 11.5 Tbps (Terabits per second).

In a short message on X, Cloudflare only shared that the attack was a UDP flood that mainly originated from Google Cloud infrastructure and that it lasted approximately 35 seconds.

“Cloudflare’s defenses have been working overtime. Over the past few weeks, we’ve autonomously blocked hundreds of hyper-volumetric DDoS attacks, with the largest reaching peaks of 5.1 Bpps and 11.5 Tbps. The 11.5 Tbps attack was a UDP flood that mainly came from Google Cloud,” the company said.

A UDP flood attack consists of a high volume of UDP (User Datagram Protocol) packets being sent to a target, which becomes overwhelmed and unresponsive ...