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"Guilty, I deserve it."一个人做什么，总跟际遇和性情有关。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.可苔湾不同，在杨长帆的统治之下，无论行商做工，几乎没有任何风险，与夷人几番交战又都大胜而归，贫民争相去投，也是无可避免的事情。时尚设计师马萨巴古普塔的生活，她进入约会世界。换到韩信麾下，受到的尊重自然是不必说的，而且也能够很好发挥自己的才能。