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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:?马氏问道：可有那个小子的消息？吴有才摇摇头：没有，吴县令已经奏报朝廷了，只怕一时奈何他不得。讲述现代人的隐藏的欲望和向欲望疾走的坏男人的故事，探讨人间的欲望与无奈，富有男人味又性感的建旭对财阀三世的位置虎视眈眈，充满欲望的他比起自己努力更想利用自己的致命魅力和惊人的头脑占有财团。一天，在一个心形的小岛上。大海把一个失忆的年轻男人吹到了岛上。谁也没有想到这个地方，将是他会未来建造爱情之巢的地方。岛上的她意外地爱上他，他们一起宣誓相爱。但突然，一位美丽的孕妇来岛上行使妻子的权利带走了他。只留下美好而短暂的回忆。她告诉自己必须放弃。 但是随后发生了总总，他恢复记忆……They are described in detail below.该剧并不是写给青少年的校园剧，而是写给我们大家的职场剧，和以往的校园剧从学校外面窥探学校和老师的方式不同，将直击校园内部的我们不熟悉的露骨真相。 徐玄振在剧中饰演私立学校临时老师高荷娜，作为没有资历的菜鸟老师，她进入的却是以教学出色闻名的大峙洞私立高中，被大家认为是空降兵和说谎精，就这样踏出了社会生活的第一步。 罗美兰饰演学校升学部部长朴成顺。她在学生面前是技高于人的“疯狗”，是典型女强人系列的“工作狂”。她是大峙洞学校的入学负责人。When the server provides some UDP-based services, such as DNS, SMTP, NTP, etc., and finds some requests, in which the Response message is larger than the Request message, the Attacker sends a Request message that forges the source IP, and the source IP forges the IP address of the victim. After receiving the Request message, the server replies the "enlarged" Response message to the victim, thus realizing the amplification of traffic. The principle is roughly as follows: