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So let's explain the rules of iptables in a common way. There was an analogy before, Each "chain" is a "checkpoint", Every message passing through this "level" must match the rules on this level. If there is a match, The message is processed correspondingly, For example, you and I are like two "messages" at the moment. Both of you and I are going to enter the customs at this moment. But the duke has a life, Only the imposing person can enter the customs, Those who do not meet this requirement are not allowed to enter the customs. So the soldiers guarding the customs followed the "rules" formulated by the duke. I began to look at you and me. In the end, you entered the customs smoothly, and I was rejected. Because you met the standard of "dignity", you were "released", while I did not meet the standard, so I was not released. In fact, "dignity" is a kind of "matching condition", "release" is a kind of "action", and "matching condition" and "action" form the rules.Therefore, we can use the iptables-save command and redirect the rules to the/etc/sysconfig/iptables file.有二皇子在，敌人会来撵你？赵锋和老鳖早就不耐烦与此同时，尹将军察觉情报系统的重要性，项家已经有所发展，此事须得重视起来，将来有机会便立即着手实施。东官有一好友勉良（郭晋安 饰）为了考取功名而日夜苦读，幸好有翠花（梁艺龄 饰）周到照顾，当他与翠花成婚后也成功高中，但没想到勉良竟与昔日爱人倩容（张慧仪 饰）旧情复燃，翠花忍气吞声顾全丈夫声明，却被倩容的贪念毁了勉良的前途。The wave of protests is beyond the scope of this book.一个处处碰壁的倒霉青年孙小健意外成为了挥金如土、脱离现实生活的浩天的私人助理，随同参加了泰国冒险主题旅行团，与一帮来自天南地北的团友，经历了一系列啼笑皆非、惊心动魄的生死考验.....