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黄真见势不妙，忙对小葱笑道：我等并非……板栗大步走出来，跟妹妹站在一处，毫不顾忌地截断黄真的话，道：杀吧，杀吧。Cliff of the FlameWhen 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.Questioner: Dream Cold Night StarsFour hours later, she and a "difficult friend" went straight to the investigation office.　　一位善良坚韧的单亲妈妈安秀妍，呕心沥血养育两个孩子，儿子体弱多病，女儿并非亲生，虽然聪明却心理有障碍。老调剧，描写杨家将与奸贼潘洪斗争。