Record 7.3TB DDOS attack blocked by cloudflare

We’re seeing botnets like Merai do more damage as they and others have attacked some infrastructure at now a record 7.3tbps.

Cloudflare says it mitigated a record-breaking distributed denial of service (DDoS) attack in May 2025 that peaked at 7.3 Tbps, targeting a hosting provider.

DDoS attacks flood targets with massive amounts of traffic with the sole aim to overwhelm servers and create service slowdowns, disruptions, or outages.

This new attack, which is 12% larger than the previous record, delivered a massive data volume of 37.4 TB in just 45 seconds. This is the equivalent of about 7,500 hours of HD streaming or 12,500,000 jpeg photos.

This is huge!

Here’s a bit about Cloudflare and here is also a bit of info breaking down the attack.

Cloudflare, a web infrastructure and cybersecurity giant specializing in DDoS mitigation, offers a network-layer protection service called ‘Magic Transit,’ which was used by the targeted customer.

The attack came from 122,145 source IP addresses spread across 161 countries, with the majority based in Brazil, Vietnam, Taiwan, China, Indonesia, and Ukraine.

The “garbage” data packages were delivered across multiple destination ports on the victim’s system, averaging 21,925 ports per second and peaking at 34,517 ports/second.

To read more, Cloudflare blocks record 7.3 Tbps DDoS attack against hosting provider as you’ll learn a lot more about this massive attack.

There is a possibility of a trivia question coming from this, you’ll have to see if that actually happens.

Thanks so much for playing!