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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:?The biggest problem for programmers is "conceit". Especially when we review other people's codes, I have seen countless scenes. When programmers review codes, they begin to attack other people's codes and question other people's abilities. It's ridiculous. I analyzed it. This kind of programmer actually has no skill, because they accuse each other of trying to tell everyone how good they are. To show their programmers by this means is actually what the legend calls "half a bottle of water".花艺公司职员凌凌七是一个真诚善良、乐于助人的好姑娘，但是性格上却很自卑懦弱。这个缺点严重地影响了她的生活，使她在工作上难以展开拳脚、实现理想，同时也不敢向爱慕的同事柏海表达情感。一次意外的机会，她和柏海参加了好梦科技公司推出的改善睡眠的高科技手环测试。手环中功能磁共振仪器发生故障，误将凌凌七的脑电波数据传输到了柏海的梦境模型中，这一失误，让凌凌七获得了进入柏海梦境的能力。由于只是在对方的梦里，凌凌七暂时放下了现实生活中自卑懦弱的缺点，努力帮助柏海克服童年时候留下的心理阴影。梦想照进现实，梦境中的勇气让凌凌七反思自己在生活中的缺陷，她积极努力的改变自己，逐渐变得自信和勇敢。在梦境和现实的交错中，相互治愈的两个年轻人，收获了美好的事业和爱情。　　雾山和三日月在一堆失了时效的案件中，揪出了一些谜点，与那些犯人周旋，然后展开了别样的推理故事。伴随着各种冷笑话，最脱力系的推理故事就此开始。一部讴歌改革开放40年伟大变革、反映中国农村深刻变化、弘扬新一代农民创新精神、探寻当代农业发展道路、思索中国三农问题的史诗大剧。全剧围绕“活下去、富起来、新农民”的结构 ，讲述了在中央“一号文件”的带领下，以秦学安、赵秀娟、张天顺、张守信、秦田、秦奋为代表的三代农民和农村干部，他们以亲历者、践行者、见证者的身份，在改革开放四十年的伟大变革中，为追求美好生活而艰苦奋斗的故事。"This proves that we have not only effectively harvested offline consumers, but also transformed a large part of the customer base through online promotion," said COO Wang Bo of Osaka Weaving House.那小巷又深又窄，马儿进去可不好走，只得令人下马进去追赶，自己在外边等。