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杨长帆也不忍打扰，直至日落西山，徐文长才从书房出来，见杨长帆正在院子里逗鸡玩，连连上前迎接：怎么不告诉我。III. Network只是今天，童岳却没有工夫去体味那最后一点春节气氛，早晨一起来，他就匆匆赶出去，买来了《武侠世界》杂志。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.After her illness, Mary found that her fear of death stems from not "really living".I am the only Kirgiz reporter in the 85-year history of Xinhua News Agency. Over the years, I have traveled tens of thousands of kilometers and interviewed many stories about border protection. As a reporter, I will use the power of news to continue the story of Kirgiz people protecting the border.田遥轻声问道：喜不喜欢？红椒转头，夕阳从亭外斜照进来，将她整个人都染上一层魅丽金光，一如图中所画，她灿然笑道：喜欢。