Cloudflare blocks largest recorded DDoS attack peaking at 11.5 Tbps www.bleepingcomputer.com/news/secu…

Internet infrastructure company Cloudflare said it recently blocked the largest recorded volumetric distributed denial-of-service (DDoS) attack, which peaked at 11.5 terabits per second (Tbps).

In volumetric DDoS attacks, attackers overwhelm the target with massive amounts of data, consuming the bandwidth or exhausting system resources, leaving legitimate users with no access to the targeted servers and services.

“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 company said in a Tuesday tweet.

“The 11.5 Tbps attack was a UDP flood that mainly came from Google Cloud,” it stated, while showing in an attached image that the attack only lasted approximately 35 seconds.

This comes two months after Cloudflare announced another record-breaking 7.3 Tbps DDoS attack targeting an unnamed hosting provider in June. The previous record was of 3.8 Tbps and two billion packets per second (pps) in an attack that Cloudflare also blocked in October 2024.