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? ? -+ 1//-1When 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.3. Shutter辛苦了，另外……杨长帆有些不好意思，但还是吩咐道，下次发案前，麻烦你叫老罗过来，我拉着货去县里试卖。The adapter mode of the object泉仙生于日本最著名的娱乐圈家庭之一——但当全世界都在等待他作为新星的首次亮相时，泉只想成为一名杰出的漫画艺术家，实现他的宅男梦！尽管他一生都被明星所包围，但10年前在一次商业拍摄中的创伤经历迫使他情感隐退，最终投入他最喜欢的小说的怀抱角色，魔法少女拉鲁鲁。然而，事实证明泉还不清楚。考虑到他远没有成为任何类型的漫画家，他加入了拍摄他过去那个可怕的广告的续集。更重要的是，他过去的搭档，也是被邀请来扮演他的角色，不是别人，正是著名演员一久良。泉不再喜欢穿裙子了——但龙马渴望看到10年前俘获他芳心的美丽“女孩”。这次宿命的重逢会变成怎样？~~改编自日本最热门漫画《爱情舞台！!"(ラブ ステージ)作者:Eiki Eiki(影木栄貴)和赵太师的插画(蔵王大志).