Internet Infrastructure Company Claudflare said it has recently blocked the largest recorded volumetric distributed Daniel-Off-Service (DDOS) attack, which reached 11.5 TBPS per second (TBPS).
In volumetric DDOS attacks, the attackers overwhelms the target with large -scale data, consume bandwidth or tedious system resources, legitimized users do not leave any access to target servers and services.
“Cloudflare’s rescue overtime has been working. In the last few weeks, we have autonomy hundreds of hyper-olumetric DDOS attacks, with the biggest access peaks of 5.1 BPPS and 11.5 TBPS with peaks,” Said In a tweet on Tuesday.
“The attack of 11.5 TBPS was a UDP flood mainly from Google Cloud,” it is shown in an attached image that the attack lasted only for 35 seconds.
This comes two months after the announcement of another record-breaking 7.3 TBPS DDOS attack to target an anonymous hosting provider in June. The previous record was in an attack of 3.8 TBPS and two billion packets per second (PPS), which was also blocked by Claudflare in October 2024.
Microsoft also reduced the 3.47 TBPS volumetric DDOS attack in January 2022, when the attackers targeted an Azure customer from Asia. Another massive DDOS attack disrupts several Microsoft 365 and Azure services worldwide in July 2024.
In April, Cloudflare also revealed in its 2025 Q1 DDOS report that it reduced the record number of DDOS attacks in 2024, with an increase in 198% quarter-over-spectacle and 358% year-to-year.
As the company said, it reduced a total of 21.3 million DDOS attacks, which targeted Cloudflare customers last year, as well as their infrastructure in 6.6 million attacks on the 18-day multi-vector campaign.
Cloudflair said at the time, “Of the 20.5 million DDOS attacks, there were 16.8 meter network-layer DDOS attacks, and directly to the network infrastructure of those 6.6 meters targeted cloudflair,” Cludflare said.
“These attacks were part of the 18-day multi-vector DDOS campaign, including SIN Flood Attacks, Mirai-Janit DDOS attacks, SSDP amplification attacks.”
The most important spike was seen by network-layer attacks, which saw the fastest growth since the beginning of 2025, which reached a 509% Yoy growth.
The passwords broke in 46% of the atmosphere, almost doubled by 25% last year.
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