《驯服的小子姨完整版》

美女老婆们自然其实上上人选了，要是绿萝……尹旭心中暗叹一声，又想歪了。前方高能！被警察事业耽误的演员来了！江苏常州新北公安分局制作《民警李建国》系列短剧，人物设定暂定四人，分别是派出所教导员，民警李建国，警花黄淑芬，民警王钢蛋...均由基层一线的民警辅警出演。As Li Gang said: If a goal is reasonable, one cannot deny it on the grounds of "insufficient resources". This is a crucial principle of doing things.他叹了口气，展开笑容，招呼道：敬文哥，你在读书？李敬文点点头，再次问道：你去哪？说着话，眼睛却疑惑地打量那马车。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.