“That escalated quickly!” According to Bleeping Computer, Cloudflare blocked a record 7.3 Tbps DDoS attack against a single hosting provider in May.

The article (Cloudflare blocks record 7.3 Tbps DDoS attack against hosting provider, written by Bill Toulas and available here) reports that 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.

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.

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. They claim to have ultimately been able to mitigate the attack without human intervention.

The article discusses more about the attack and how it was evidently thwarted. I’m very interested to hear what my cyber peeps have to say about this one! 🙂

So, what do you think? Are you surprised that Cloudflare blocked a record 7.3 Tbps DDoS attack – in 45 seconds? Please share any comments you might have or if you’d like to know more about a particular topic.

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