想不到吧，长帆的本事。
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.
7. Observer mode
当日雁荡山下的惨烈情景历历在目，越军的勇猛和厮杀惨烈已经在他们心中留下了不可磨灭的印记。
So, how do we modify the actions in a certain rule? For example, I want to change the actions in the following rules from DROP to REJECT. What should I do?
张翠山小声对殷素素解释道：师父老人家一直性烈如火，脾气有些暴。
天启要是不想写神雕大侠，就不会在《倚天》中，留下那么多伏笔。
讲述赵家之女赵织织阴差阳错与男主段子矜相爱，而后又发现两家势不两立，无法走到一起的虐恋故事。
Different Independent Poisoning Damage = Current Level Poisoning Damage * (Different Naked Independence-38)/(Current Naked Independence-38)
Charm 7: 8001-15000
二人一路走出牢房，军士见此人，纷纷行礼，头不敢抬。
—Sarah Moore Grimké, activist for women’s suffrage, 1837
你一个人在丰县，要操劳公务，身边也没个贴心人照应，肯定吃了不少苦吧？在家的时候，婶子和慕琴事事都替你安置妥当，在外头就没那么方便了。
不止如此，尹旭还有另外一层想法，那就是震慑。
这条街上酒楼店铺多了些。
这是一部纪念妈妈的电影。《妈妈和七天的时间》是一个讲述20世纪90年代在中国农村七天发生的故事。故事里记载了小咸，一个十二岁女孩对家庭和村庄的记忆。在这七天里，发生了三次死亡和两次出生。
Macro commands: d, df, f, d, df, f4
Let's start the tutorial:
