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Cloudflare provides unmetered and unlimited distributed denial-of-service (DDoS) protection at layers 3, 4, and 7 to all customers on all plans and services.
The protection is enabled by Cloudflare’s Autonomous DDoS Protection Edge, which automatically detects and mitigates DDoS attacks.
The Autonomous Edge includes multiple dynamic mitigation rules exposed as managed rulesets, which provide comprehensive protection against a variety of DDoS attacks across layers 3/4 and layer 7 of the OSI model.