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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.Website of the new system: http://218.2.208.148: 9092/op/login.aspx　　而与此同时，和他的未婚妻蛯名美优一起工作的甜点师松井萌绘又让他的心更加摇摆不定。与美优的邂逅、与萌绘逐渐交心的过程撕扯着他，两个性格截然不同的女性让他无所适从。All of the above can be used as basic matching conditions.In general, the order of click events is from parent to child, and then from child to parent.Blood type with leadership ability from an early age