免费福利未满十八勿进

Ten: Understanding the Intermediary ModelWhen 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.若是他们参与追杀受伤的尹旭，结果如何还真不好说，说不定会成功，彻底的完成任务也未可知。　《黑钱胜地》宣布续订第四季！并确定将是最终季！在第三季最后，电话公司的爆炸是一个高潮，Netflix发布了一个预告，其中该系列剧的四个主角接受审问。2017-07-16 13:43:31