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Play Bone Wu DaxiuWhen a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.　　该相信什麽？到那时候可就真的成了人为刀俎我为鱼肉，他田荣也算英勇一世，怎么可能任人鱼肉？所以现在绝对不能离开临淄，至少到现在为止，还掌控着原来齐国的大部分土地，经过两年的恢复，实力壮大不少。Statement of Rights:懒癌患者安安是一家广告公司的插画师，拥有自由随性的性格加上天马行空的想法，每当繁重的工作之后亦或是灵感来了，安安都会为自己做一道“懒人餐”来满足自己的味蕾，同时记录下自己的心情，这个习惯招来了死党加同事加邻居加学长加上爱占便宜性格的卫斯理天天踩着饭点来蹭饭。一天广告公司突然空降了一位顶头上司李睿凡来做管理，不苟言笑的高富帅彻底打破了安安清闲自在的生活，另一边古灵精怪的表妹余果又要长期寄居在家里，正在安安焦头烂额之际，咖啡店老板娘林琦的回归给了安安一丝安慰，但她似乎也是带着麻烦回来的，此时睿凡的哈佛同学亚当穷游世界之后来投靠睿凡，欣喜的林琦以为亚当是追她而来，却发现亚当完全不记得她了，在这个公司、社区、咖啡店里六个人的故事发生着......他虽不知道尹旭消息的来源，但越王都这么说，自然是确有其事，故而不敢有分毫怠慢。