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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:?Netflix续订《#外滩探秘#OuterBanks》第二季。At that time, I invested in a small platform. I didn't know it for almost a month. I started to panic when I found that the website couldn't be opened. After the third party posted, someone pulled me into the rights protection group. Only then did I know that someone was helping to organize rights protection.I nodded and motioned for him to talk about the battle. Zhang Xiaobo coughed lightly, cleared his throat and began to say:时间来到1985年，Cameron(麦肯锡·戴维斯)和Donna(凯莉·毕许)的Mutiny公司上线，作为因特网理念的开拓者，公司运营不顺，两个妹子一脸心塞。　　龙、英在明及宜暗中安排下，终化敌为爱，走进教堂，更成功创业，生意兴隆。而明跟宜相处日久，竟动了真情。二人相恋却被明拍拖多年的女友美(袁彩云)揭发，一怒下设计欲把宜驱走……奥利弗伍德沃德的非凡真实故事。这是1916年，德沃德泪别他的年轻女友，从军前往西部前线，其间还要穿越德国阵地。德沃德和他的团队从事秘密隧道工事，铺设炸药。1917年6月17日，奥利弗伍德沃德和他的战友们用血泪换来的那场19分钟的爆炸造就了世界上有史以来最大的一次人工爆破，爆炸长度相当从伦敦延绵至都柏林……