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Reset authentication takes advantage of the reliability of TCP protocol, and DDOS protection system responds to syn first. When the protective device receives syn, it responds to syn_ack and sets the Acknowledge number to a specific value (recorded as a cookie). When the real client receives this message and finds that the acknowledgement number is incorrect, it will send a reset message with a sequence number of cookie + 1. The source of the forgery will not have any response. In this way, we can add the real client IP to the white list. ?Above, by registering one or more delegate instances for the event with + =, in fact, you can also directly register methods for the event.徐文长继续品味着刺绣，想不到，二夫人竟能将刺绣做到这般地步，可惜啊……可惜什么？可惜是瘦马女儿身。“无法抗争的命运的恋爱…三人编织出立于人生歧路的男女间令人感伤的爱情故事——”主人公瀧沢完治在银行工作，工作认真努力。和妻子瀧沢真璃子最近对话变少，和女儿也有所疏远，但他也接受了如此平稳的家庭生活。但某日被毫无道理地降职左迁，使他对自己的工作产生了极大的困惑。出现在他面前的是一张雪山的海报。他以出差为名，一个人去了瑞士。在瑞士的风雪中，他看到了一位日本女性——目黒栞，知性、有品位的她也是一人前来旅行。大雪裹山，月照山头的夜晚，两人是旁人未曾想的投机…另一方面，真璃子怀疑丈夫出轨却又未问出口，这样的她，竟对女儿的未婚夫陷入了恋爱…In addition to various attack methods, DDOS attacks often use false source IP, which is also one of the reasons why DDOS attacks are difficult to defend.