Dr. Zongming Fei, Assistant Professor, Department of Computer Science at University of Kentucky presenting: The Sigcomm'01 paper: at http://www.acm.org/sigs/sigcomm/sigcomm2001/p2.html On the Effectiveness of Route-Based Packet Filtering for Distributed DoS Attack Prevention in Power-Law Internets Kihong Park, Heejo Lee (Purdue University) Denial of service (DoS) attack on the Internet has become a pressing problem. In this paper, we describe and evaluate route-based distributed packet filtering (DPF), a novel approach to distributed DoS (DDoS) attack prevention. We show that DPF achieves proactiveness and scalability, and we show that there is an intimate relationship between the effectiveness of DPF at mitigating DDoS attack and power-law network topology.