新婚夫妇换交换完整版

这时，有随从将灯笼提了过来，帮胡镇检查伤处。对哦，全球定位是依赖卫星的，这里有卫星就有鬼了，稍微令人宽慰的是，黑科技里的航海图、地形图以及诸多测量功能还能使用，可其实也没啥大用，古往今来，全球各地，率先表示地球是圆的的人，都没什么好下场。小二听了，急忙去厨房安排。其他事，等父皇醒来自会交代。东方姑娘才是真女神。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.