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这样的热闹，可是多少年都难得遇见一回的。众人不觉尽皆愕然，宋义来祭拜了？一瞬间，尹旭心中泛起一个念头——猫哭耗子。Home Operator与此同时，王室的宗教政策在民间引发了著名的“求恩巡礼”事件，亨利八世下令对其进行血腥镇压。看到当初襁褓中的婴儿已经长大成人，成为一个顶天立地的青年，燕南天心中也是一阵激荡。故事讲述13岁的凯拉（艾尔西·费舍尔 饰）在初中的最后一周，所经历的青春故事...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.