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Do you have any idea?Clinical Supervision of MDTSome people think that: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.《台北歌手》（英文名：ROSEKI 1914），2018年台灣時代劇。由莫子儀、黃姵嘉、楊小黎領銜主演，於2017年開鏡，客家電視台於2018年4月2日上檔。本劇講述台灣第一才子呂赫若的故事。作为安家十二味传人的世界名厨安文宇（陆毅 饰）因一场意外失去了味觉，一心想要学会安家十二味的“性情料理”厨师靳津津（郭采洁 饰）闯入了他寡淡的世界，成为他味觉的开关，由此拉开了故事的序幕。当年，尹旭与英布、吴臣三人一道去会稽，是和项梁一道反秦，而非投奔成为他项氏家臣。