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板栗、黄瓜、黄豆等人都大笑，红椒也乐坏了。自始至终，杨寿全夫妇都没有问过为什么，去哪里一类的问题。Limit 15 and its accessoriesThe eldest son of the Lins 03Now, 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.《打黑重案组》故事发生在南方市，当地的公安局打黑重案组遭遇到一桩棘手案件。在破案过程中，重案组受到各种各样的阻挠，案件侦破几度中断。但公安局长和乾警们不为困难所阻，不顾自己和家人所遭受的苦痛，坚持调查最终查清案情，一举打掉了南方市的黑恶组织。