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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.众人实在憋不住，笑得东倒西歪。东京飞马书房吉祥寺分店，担任副店长的西岗理子（稻森泉 饰）拥有卓越的指挥能力。多年来店员们对她无比依赖，大小事务全由理子裁决定夺。不知不觉间，店员们已经习惯了这种按部就班无需彰显个性的工作，直到某一天一位新店员的到来，令吉祥寺分店的气氛为之一变。来者名叫北村亚纪（渡边麻友 饰），是一个饮食无忧不折不扣的富二代。她对书籍有着难以比拟的热爱，加上大小姐的身份和性格，所以不由分说将许多自己的想法带入到工作中来，也由此和理子发生着碰撞。经过一系列事件，她们似乎能够了解彼此的真意，不过书店女孩的生活和战斗才刚刚开始……东海之王，于杭州，被七品巡按捉拿归案。Wow Thing 中文字幕 -- 涩琪(Red Velvet) & 信飞(GFriend) & 金请夏 & 全昭妍胡镇吓得肝胆欲裂，那惨叫声在黑夜中惊得人汗毛乍起。Vill饰演一位假扮后妈，使用奇妙“仙法”融入三个孩子，同时与大叔男主上演一段美妙爱情，当漂亮又犀利的“假后妈”遇上变装怪人的真爸爸，搞笑的爱情故事就要发生啦！美Vill的新剧终于要播啦[太开心]期待很久啦，一定要追！