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顾小玉扶了扶自己的额头，觉得还是对天启太过宽容了，每天仅仅是嘲笑显然不够，应该奚落，责骂，鞭挞……顾小玉脑中闪过一连串很黄很暴力的场景。商议过几年办成亲这件大事。爱一个人，要以一种合适的好方式，否则的话往往就会是的期房。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.真是左也不是，右也不是，一脸憋屈难受。赵王歇听到呼喊，下意识地地回头看了一眼，瞧见是李左车之后，脸上露出了不悦之情，而且还显得有些愤怒。No.21 Tian Fuzhen