EXCLF: A LDoS attack detection & mitigation model based on programmable data plane☆ ☆

The SDN architecture decouples control plane from data plane, making it more susceptible to various abnormal traffic and network attacks, with LDoS attack being one of them. LDoS attackers periodically send short- duration pulses with high rate to bottleneck links to preempt legitimate TCP traffic bandwidth, severely disrupting the transmission of TCP traffic. Current researches on LDoS attacks are mostly implemented in SDN environments, making them exhibit poor portability during deployment and unavoidable time delays. This paper proposes EXCLF, a LDoS attack detection and mitigation model fully deployed on programmable data plane. To identify LDoS attacks, the model gathers features of the traffic going through the switch and feeds them into a decision tree. Once LDoS attack happens, the model collects data at flow level to pinpoint the attacker and initiates corresponding mitigation measures. Extensive experiments were conducted to evaluate the proposed model, and the results indicate that EXCLF achieves a correct rate of 96.39%, with false positive and false negative rates both below 3%. Additionally, the model demonstrates low detection latency and can quickly respond to attacks. The model proves to be an attack detection and mitigation method with good portability and efficiency.