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针对当前防御DoS攻击方法因判定攻击帧合法性条件属性过多所导致DoS防御性能不足的问题,基于粗决策理论,利用粗决策规则方法,建立防御无线DoS攻击的模型,给出基于粗决策规则的防御DoS智能帧过滤算法(802.11w-SFF),并对该方法进行实验分析.802.11w-WiFi设备在攻击速率为250fps的情况下,未使用802.11wSFF方法时,TCP流量变为没有攻击时的16%,UDP丢失率上升为80%;使用802.11w-SFF方法后,802.11wWiFi设备的TCP/UDP数据通信性能没有受到DoS攻击的影响.实验分析说明802.11w-SFF方法应用于移动网络能有效地防御DoS攻击.
Aiming at the problem that DoS defense performance is not enough because of the legitimacy conditions of the attack frame, the current defense DoS attack method is based on the rough decision theory and the rough decision rule method to establish the model of defense against wireless DoS attack. Based on the rough decision rules (802.11w-SFF), and experimental analysis of the method.802.11w-WiFi device in the attack rate of 250fps case, when not using 802.11wSFF method, the TCP traffic becomes no attack , The UDP loss rate increases to 80% .With the 802.11w-SFF method, the TCP / UDP data communication performance of 802.11wWiFi devices is not affected by DoS attacks.Experimental analysis shows that the 802.11w-SFF method can be applied to mobile networks Effectively defend DoS attacks.