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少年和汉子们见来了个小女孩。19世纪末的爱丁堡，在一个极度寒冷的冬天，痛苦的孕妇找到被人称作巫婆的玛德莲大夫（Marie Vincent 配音）。不久，一个孱弱的婴儿降临人间，但是这个小家伙的心都冻僵了，为此玛德莲帮他安装了机械心脏。孩子的生母不告而别，玛德莲将其作为亲生儿子抚养，并起名杰克（Mathias Malzieu 配音）。她告诫杰克不可以生气，避免强烈的情绪起伏，尤其要避免陷入爱恋。小杰克一天天长大，在他十岁的那年他首度来到镇上玩耍，并和命运中的天使邂逅。他的机械心脏出了故障， 冒出浓烟，他知道他恋爱了。从这一天起，杰克注定要踏上追寻爱情的征程……公安英雄宋名扬在卧底过程中，击毙了境外贩毒集团的头目“金少爷”。其姐化名施雨入境，开始实施对宋名扬一家的“报复计划”。宋明扬与刘子昂决定将计就计，制定了针对对手报复计划的“猎隼计划”。暂不知情的战友傅伟，秉公执法，坚持调查，提议开除宋的警籍，送宋去“强制戒毒”等，给宋名扬带来了一次次的“麻烦”。施雨的“报复计划”在贩毒集团内部也引起了矛盾，于是“尽快干掉宋名扬”成了另一势力韩森的目标，使得宋名扬身处枪口，险象环生，演绎了一场“明卧底”的生死悲歌。宋名扬大智大勇，殚精沥血，最后终于破获毒贩的“麦金通道”。郑氏微微一笑，道：娘早就料到你会回心转意的，也早做了准备。　　牡丹的婚期越来越近，突然小莲发现青锋另有秘密情人紫烟，迎亲当天，她强行进入紫烟体内，挡住了红轿。不料青锋为了维护这段政治婚姻，突然变脸，赶走了紫烟。乱哄哄中，没有听到牡丹侍女的哭喊，牡丹已在轿中泪尽而亡！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.