Research On A New Type DDoS Attack
Zhijun Wu · Information Security and Communications Privacy · 2007
Shrew DDoS(Distributed Denial of Service)attacks,aslo named low-rate DDoS attack,is a new-style DDoS attack,Low-rate DDoS attacks is essentially a periodic short burst which exploits the deficiencies of the minimum RTO(Retransmission Time Out)of TCP flows and forces all affected TCP flows to enter the retransmission timeout state.The period T is calculated by the estimated TCP RTO time implemementations at legitimate sources.Because of its low rate,it can avoid traditional high rate detection mechanism and gravely degrade the throughput of the victim.