New Record: Cloudflare Automatically Blocks 7.3 Tbps Attack
The target of the attack was a hosting service provider customer using Magic Transit to protect their IP infrastructure. As the latest DDoS threat report shows, Internet infrastructure providers are increasingly becoming a priority target for attack campaigns.
In January and February 2025 alone, Cloudflare handled more than 13.5 million DDoS attacks targeting its own systems and hosting service provider customers.
7.3 Tbps in 45 seconds = 37.4 Terabytes of data
While 37.4 TB is not an unusual number today, transferring this amount in just 45 seconds is extremely dangerous. That's equivalent to:
9,350 full HD movies
7,480 hours of HD video (almost a year of continuous viewing)
9.35 million songs (~57 years of non-stop listening)
12.5 million high-quality photos (~4,000 years of taking 1 photo per day)
Attack technical details
Average: 21,925 destination ports per second
Peak: 34,517 destination ports/s, only to 1 IP address
Protocol used: UDP is the main (99.996%)
Other forms: QOTD, Echo, NTP, Mirai, Portmap and RIPv1 (0.004% of traffic)
