The rules are able to generate different signatures based on various properties of the attacks and the signal strength of each attribute. Once attack traffic matches a rule, Cloudflare’s systems will track that traffic and generate a real-time signature to surgically match against the attack pattern and mitigate the attack without impacting legitimate traffic.

HTTP response metrics such as error codes returned by customers’ origin servers and their rates.

HTTP request metadata such as HTTP headers, user agent, query-string, path, host, HTTP method, HTTP version, TLS cipher version, and request rate.

Packet fields such as the source IP, source port, destination IP, destination port, protocol, TCP flags, sequence number, options, and packet rate.

To detect and mitigate DDoS attacks, Cloudflare’s Autonomous Edge and centralized DDoS systems analyze traffic samples “out-of-path”, which allows Cloudflare to asynchronously detect DDoS attacks without causing latency or impacting performance.

The Autonomous Edge includes multiple dynamic mitigation rules exposed as Cloudflare DDoS Attack Protection managed rulesets, which provide comprehensive protection against a variety of DDoS attacks across 元/4 and L7 of the OSI model. The protection is enabled by Cloudflare’s Autonomous DDoS Protection Edge, which automatically detects and mitigates DDoS attacks. Cloudflare provides unmetered and unlimited distributed denial-of-service (DDoS) External link icon Open external link protection to all customers on all plans and services.

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