The document presents a denial-of-service (DoS) attack detection system that utilizes multivariate correlation analysis (MCA) for network traffic characterization and employs anomaly-based detection for recognizing both known and unknown attacks. It develops a triangle-area technique to enhance the speed and effectiveness of detection, outperforming existing methods in accuracy based on the KDD Cup 99 dataset. The proposed system offers improved accuracy in characterizing traffic behaviors while minimizing false alarms compared to traditional misuse-based detection systems.