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Impeachment of the queen, asking the emperor to scrap the passbook like snowflakes, flew to the cabinet, the emperor...黄豆无辜地回道：不是你先问我的么？你先问我小葱姐姐的事，我才问你姐姐的事。老丁接过风铃，无奈一笑，他也知道这东西实际值不了什么钱，纯粹就是心意：那我收下了，回头帮你宣传宣传。泰剧最后一间房《东北灵异录》以农村诡异事件为主题，讲述了村里的得道高人老王与其义子降妖除魔的故事，由于老王有感知灵异的能力，所以每当村里有灵异的事件，老王都会在第一时间有心里感应，并携其义子将其化险为夷，直到有一天，村里的强拆大队打翻了钉子户家狐仙灵牌，狐仙复活了，并开始了她的杀戮，而老王也迎来了他人生中的重大挑战,就这样一场魔与道之间血海恶战势在必行，究竟鹿死谁手....Now, let's imagine why these "checkpoints" are called "chains" in iptables. As we know, The purpose of a firewall is to match "rules" for passing messages, Then execute the corresponding Action, So, when the message passes through these checkpoints, You must match the rules on this level, However, there may be more than one rule on this level, But there are many rules, When we put these rules in a chain, A "chain" has been formed. Therefore, we imagine each "checkpoint" as shown in the following figure. In this way, it is more appropriate to call them "chain". Each message passing through this "checkpoint" must match all the rules on this "chain". If there are qualified rules, the corresponding actions of the rules will be executed.