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Cloudflare detected and mitigated several hyper-volumetric DDoS attacks over the weekend of Feb. 11-12, including the largest HTTP DDoS attack on record.
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The majority of the DDoS attacks peaked at 50-70 million requests per second, with the largest exceeding 71 million rps.
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The attacks were HTTP/2-based and originated from over 30,000 IP addresses, targeting websites protected by Cloudflare, including gaming providers, cryptocurrency companies, hosting providers, and cloud computing platforms.
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Cloud providers were used as attack points, with Cloudflare offering a free botnet threat feed to service providers.
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The attacks' motivation is unclear, but it was not related to the Super Bowl or Killnet.
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The size and sophistication of DDoS attacks have been increasing over the last few months.
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In January, Cloudflare found that the number of HTTP DDoS attacks increased 79% year-over-year, and volumetric attacks exceeding 100 gigabits per second grew 67% quarter-over-year.
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The previous record HTTP DDoS attack was 46 million rps in June 2022, but the largest attack was 35% higher.
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Ransom DDoS attacks have also increased, with one in every four Cloudflare customers reporting being subject to a Ransom DDoS attack or threats.
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Cloudflare has seen more attacks originate from cloud computing providers over the last year.