Record DDoS Pummels Site with Once-Unimaginable 7.3Tbps of Junk Traffic
- Cloudflare defended against a record 7.3 terabits per second DDoS attack in mid-May 2025 targeting an unnamed hosting provider worldwide.
- The massive multi-vector attack originated from over 122,000 IP addresses across 161 countries, with nearly half the traffic from Brazil and Vietnam.
- The attack flooded approximately 34,500 destination ports with 99.996% UDP packets, overwhelming the target’s system and denying legitimate traffic.
- The assault lasted 45 seconds, delivering roughly 37.4 terabytes of junk data, and peaked at 45,097 unique source IPs per second, making it the largest attack recorded.
- This event confirms the rising threat to hosting providers and critical internet infrastructure, suggesting continued escalation in DDoS attack scale and sophistication.
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In 45 seconds, 37,000 gigabytes of data were sent to the target's servers. The identity of the perpetrator and the target was not disclosed.
A DDoS attack has attempted to knock down the infrastructure of a Cloudflare client, flooding them with 7.3 Tbps of data, the most brutal figure ever recorded.


Record DDoS pummels site with once-unimaginable 7.3Tbps of junk traffic
Large-scale attacks designed to bring down Internet services by sending them more traffic than they can process keep getting bigger, with the largest one yet, measured at 7.3 terabits per second, being reported Friday by Internet security and performance provider Cloudflare. The 7.3Tbps attack amounted to 37.4 terabytes of junk traffic that hit the target in just 45 seconds. That's an almost comprehensible amount of data, equivalent to more than…
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