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Please kill in sequence! ! ! Please kill in sequence! ! ! Please kill in sequence! ! !The detection and defense of DDOS attacks should be considered as a whole system from three different stages before, during and after the attack.“女王”凯特·布兰切特演而优则导，不但导演电影，还涉足电视剧，首部参与执导的新剧定名为《Stateless》，根据2004年澳大利亚移民局的一则真实丑闻改编。 当时，一名幼年起就生活在澳洲的德裔妇女，被当成精神不健全的非法移民无故关押一年，该丑闻一经爆光，引发澳洲妇女组织的震怒和抗议，以至于澳洲国会不得不介入此案进行调查。 这部名为《Stateless》的剧集将由Matchbox Pictures公司制作出品，澳大利亚联邦资助机构宣布将为该剧提供发展资金。目前还未确定布兰切特是否参与主演。The tester is Sonik, whose general attack is a single-stage attack, and the multi-stage attack has yet to be tested.故事讲述受疫情影响而不得不去意识到“与人之间的距离”的现代，以“爱”与“距离”为主题，描述住在同公寓的男女6人相遇、交心的故事。Let's start to analyze four situations in combination with log. For convenience of viewing and description, I will divide log into three parts with blank lines. The first part is down event, the second part is move event, and the third part is up event.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.