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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.Good book!英布突围成功了，他最有可能去哪里？荥阳？不错。Anti Matter is science fiction noir. Ana, an Oxford PhD student, finds herself unable to build new memories following an experiment to generate and travel through a wormhole. The story follows her increasingly desperate efforts to understand what happened, and to find out who - or what - is behind the rising horror in her life. Directed by Keir Burrows and produced by Dieudonnée Burrows.SimpleEventPlugin.extractEvent