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陡然让他寒意彻骨，一颗心沉到了谷底。可是，害得板栗哥哥这样，她实在难以心安。When 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.我们都爱笑爆笑回归，肖旭张学恒上演嗨二兄弟。The command window at the lower part of AutoCAD prompts "Specify Starting Point". Click above the elevation character to place the attribute in the appropriate place, as shown in the following figure.《九星天辰诀》讲述了男主角叶辰因一把神奇的飞刀穿越到异世大陆，突破重重艰难险阻，最终参悟了至高心法“星衍飞刀”及练气法门“九星天辰诀”，成为生命祖神的故事。同名网剧以主角叶辰的视角，辅以爱情元素为佐料，用无厘头的方式表现出了他在除妖之路上发生的一幕幕啼笑皆非的桥段。No Thousand 211 Styles, Eight Young Girls: + C