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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.Timing trigger, cannot be called.该故事讲述苏灿出神官宦之家，玩世不恭，年少轻狂。硝烟大会上，父亲广州提督苏贵遭硕拖一党暗杀差点丧生，苏灿因此与硕拖结怨，也与丐帮帮主刘僵相识。醉梦楼沈洳玉（周洛伊饰）是他的红颜知己，在苏灿多次被硕拖打击之时，均不离不弃。硕拖担心苏贵查出他与西方勾结倒卖鸦片之事，便以徇私舞弊之罪杀害苏家三十多口，打断苏灿的四肢，原以为苏灿会因此消沉潦倒，没想到苏灿触底反弹，跟随刘僵苦练功夫，为完成父亲硝烟的遗志与硕拖抗衡，最终与左都御史顾瀛合力将硕拖一党绳之以法。Arbor Networks' Pravail Availability Protection System (APS)TelecommunicationsHowever, under the circumstances at that time, I thought these things had little effect, because after we knocked them out, we began to gather in more quantities and launched attacks on positions from all directions. Judging from the form of attacks, they were quite organized and definitely beyond the reach of ordinary wild animals.Well done. Recently, there have always been junior high school students who have used up their soul Abizai to brag about boss garbage. I just want to say, what strength is it based on the solid injury of soul? It is really garbage!