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Smoke bombs before burning:Come and join Binjiang Environmental Protection QQ Group: 202412159 or　　十六个小故事有神奇，有烦恼，有笑声，有感动，对爱情的向外，对亲情的追忆，对人生的徘徊，对未来的恐惧，构成了一幅咸鱼和rose生命多种可能性的美丽画卷，犹如人生百味，柴米油盐酱醋茶，酸甜苦辣咸，喜怒哀乐怨。人生总是在希望中面临困惑走向绝望，又从绝望中坚强不息走向希望，故事中咸鱼和rose心底善良，拼搏向上，于人生困境中搏出一片青天，体验了生命的各种美好，传递了人生应该坚持希望，积极向上拥抱美好的乐观精神，表达了生命不止，自强不息的内涵思想。距今二十年前，以采矿业为主的诺瓦斯科提亚小镇发生一起严重的瓦斯爆炸事故，在矿洞中的工人几乎悉数丧生。事故是由于负责人离开岗位参加情人节舞会，以至于无人监管所引起的。一年后，惨剧中的唯一生还者哈里•沃登对矿上的负责人大开杀戒，他随后被强制送往精神病院。但在离开时哈里留下诅咒，小镇从此不可再举行情人节舞会。Http://www.jiemian.com/article/2060747.htmlWhen 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.