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还有，林聪张嘴大哭的时候，那一嘴细齿也是他熟悉的。她要继续听，听这孩子到底还经受了些什么。The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?李坏是个孤儿，他脸上的微笑仿佛永远不会消失。从来没有人知道，他来自世代簪缨的家族！他的爷爷更是近百年来江湖中独一无二的名侠“小李飞刀”。漂泊多年，李坏凭借亡母的锦囊里藏着的一张宝图，独处七年，练成了天下无双的飞刀，找到了富可敌国的宝藏。为了心中不灭的理想和爱情，李坏回到少年时的山城寻找心上人方可可。可惜一切带给李坏的只有无边噩梦。李坏被怀疑与皇宫大内的失窃黄金有关，一时成了江湖人人必诛之而后快的大盗。然而世事难料，奉皇命捕杀李坏的“月神”薛采月竟然爱上了李坏。他们排除万难，有了一个温暖的家。直到有一天李坏醒来发觉已怀了他骨肉的月神不告而别，只留下一张字条，说和李坏情缘已尽。原来月神要向李坏之父李曼青挑战，她要摧毁“小李飞刀”这个江湖神话，替亡父报仇。但是李坏血脉里流着属于“小李飞刀”的血，他绝不可以令家族荣誉受污。DDOS is not an attack, but a general term for a large category of attacks. There are dozens of types of it, and new attack methods are still being invented. Every link of website operation can be the target of attack. As long as one link is breached and the whole process cannot run, the purpose of paralyzing the service is achieved.The re-emergence of underground services specializing in payload manufacturing highlights the fact that:It is a sequence of events rather than a single event that is studied.