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韩信轻轻点点头，他有意挑选这些士兵前来挑战就是这个缘故。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.The first is to learn one or two design patterns and always want to use them in my own code.递与赵文华，请总兵过目。10.1.4 Non-pathological hematuria is qualified.美术老师降矢圆造为了治疗心爱女儿的病，特意来到一个乡下小学任教。这样七海就可以在大自然的环境中自在的生活了。和其他兄妹一样，她也选择了一条自己的路，开了一家自然食品店。但是由于经营不善欠下不少债。圆造感觉到志麻的异样，他返回头去找志麻，却意外得知家里的老房子已经被卖掉了，他这才意识到志麻的困境。...The commands in the defined CMD will not be executed, but the command of command will be executed.