From Traffic Anomalies to Blocked IPs: Building Real-Time DDoS Detection

This article presents a practical, library-free approach to DDoS detection that developers can implement and understand at every level. As DDoS attacks continue to threaten web services, having a transparent defense mechanism combining real-time anomaly detection with kernel-level IP blocking provides both security and operational visibility. The sliding window technique and automated iptables integration demonstrate how to build production-grade DDoS protection without relying on expensive third-party solutions.