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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.然而领头的人却不肯放小苞谷回来了，说怕泄露行踪。SFC Perfect, No Found Can't Run Game玉老爷有二子，大子鸿鹄（邵仲衡饰）是大学生，对国事关心，二子年幼并有一童养媳童素素（罗慧娟饰），常满对素素心仪，唯独她锺情鸿鹄。蒲公公邂逅玉老爷之妹玉生烟（龚慈恩饰），生烟连番波折后，终跳过世人歧视与蒲公公相爱。鸿鹄眼看溥仪重登帝位，手持榴弹欲炸死张勋，失手牺牲。而玉老爷一家也被抄家，玉家失火而众人四散逃走。"The hotel is located on the side of Yalong Bay Central Square. It is divided into one area and two areas. The first area is older and the second area is newer. The decoration style is more conventional. The lobby is flanked by guest rooms with good scenery.「恋爱黑手党」是一档恋爱推理综艺,12名素人聚在学校度过两天一夜,寻找爱情的同时进行“黑手党游戏”。其中共有8名单身及4名黑手党,即有两对真实情侣混在其中。