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If an attack is detected, the management center will start a cleaning scheme to pull the mixed traffic of attack traffic and normal traffic through BGP, CDN, etc. Pull the mixed flow to the flow cleaning center for cleaning. The problem in the process of traffic cleaning is that the current DDOS attacks present a mixed attack state with multiple attack methods coexisting. In this case, how to efficiently detect attacks is the main problem currently facing. After consulting numerous data, Huawei's "seven-layer cleaning plan" is found to be very enlightening. The scheme comprehensively analyzes data packets for mixed traffic through seven layers of defense measures such as static filtering, abnormal message filtering, scanning and snooping message filtering, source legitimacy authentication, session-based prevention, feature identification filtering and traffic shaping, so as to detect attack traffic to the greatest extent. The framework of Huawei's "seven-layer cleaning scheme" is shown in Figure 2. After the traffic is cleaned, the attack traffic is discarded, and the normal traffic is injected back into the network through MPLS, GRE tunnel technology, etc.大苞谷气坏了，坚决拒绝，道不必。她就那么静静地打量他，察觉他望过来，便垂下眼睑，不再直视龙颜。Button-Pipeline Attack　　无知的年轻人们，为了一个神秘的目的必须死去……　　死去的笃志竟穿越回高中时代，在确认周遭的一切后，他意识到自己的时代来临，利用已知的未来的知识，笃志靠赌马赚取大把金钱，拯救了自杀的朋友，考取了一流的名校，一转成为举世瞩目的天才青年。