The Heuristics engine processes all requests. Cloudflare conducts a number of heuristic checks to identify automated traffic, and requests are matched against a growing database of malicious fingerprints.
The Heuristics engine immediately gives automated requests a score of one.
The Machine Learning (ML) engine accounts for the majority of all detections, human and bot. This approach leverages our global network, which proxies billions of requests daily, to identify both automated and human traffic. We constantly train the ML engine to become more accurate and adapt to new threats. Most importantly, this engine learns from traffic across all Cloudflare domains and uses these insights to score traffic while honoring our .
The ML engine produces scores 2 through 99.
The Anomaly Detection (AD) engine is an optional detection engine that uses a form of unsupervised learning. Cloudflare records a baseline of your domain's traffic and uses the baseline to intelligently detect outlier requests. This approach is user agent-agnostic and can be turned on or off by your account team.
JSD is enabled by default but completely optional. To adjust your settings, open the Bot Management Configuration page from Firewall > Bots.