Smarter Web Security, With Your Help

This post describes the foundational security architecture of Cloudflare, emphasizing a distributed, community-driven approach to threat detection and mitigation. It details the analysis of log data for anomalies like 404 error rates, crawler behavior, known attack signatures, and botnet activity. It also introduces the concept of positive scoring for legitimate user behavior and the feedback loop from user trust/block actions to improve the security engine. The post highlights the careful monitoring of false negative and false positive metrics.