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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.本剧是在大的时代背景下，以当年共产党解放和接管城市为主要事件线；以文、史、杜三家自身与互相恩怨为主要关系线，以共产党人林然、文华、文达、杜来峰，实业家史鸿儒，爱国知识分子鲜于杰，外国买办史鸿庭，敌特莫千、古飞雪、樊迟歌、一点红为主要人物线；以革命者的信仰、失败者的反扑、游移者的彷徨、堕落者的末路和旧时代人的新生及兄弟姐妹的手足唇齿情和恋人之间的生死离别情为主要命运线，展示了那个动荡年代、天翻地覆的时代变化，以及共产党人的坚定信仰、远大抱负、高尚情操和卓越才能……　　摧毁魁拔，是天、地两界勇士每隔333年浴血奋战的重任和无上的荣耀。律师韩绪年轻有为,事业成功但夫妻关系冷淡. 碍于朋友情面,韩绪出面为被控涉嫌贩运毒品的缪兰做辩护律师.缪兰入狱前是"红翻天"的老板,年轻漂亮.入狱后一直喊冤不止,认为自己是被诬陷的.当韩绪在看守所会见缪兰时,情绪过激的缪兰竟挟持韩绪要求释放.警方紧急出动,韩绪沉着应对,化解危机.出于职业敏...　　Theerat这边就还是和Tiansee纠缠，让她有机会以此来把Rattikorn气得要疯了. Tiwa一看局势不好，想通过跟tiansee假结婚来阻止，然后两人通过相处，假戏成真的节奏。抗日战争末期，阿尔山的原始森林遭到了日本侵略者疯狂的采伐。地下党员陈森海带领众人歼灭了日军，将被掠往日本大批木材又回到中国。香云忙下车。