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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.现在没有想到只要能在启明上签约，然后只要写作，就有钱，这让大家更没有了后顾之忧。System_addr=d. Lookup ('system ', 'libc')老皇帝心中恐慌不已，便问太医自己怎么样。大苞谷听他说的有理，虽气怒也无法，对玉米恨声道：别指望我叫你五哥。抗日战争期间，在东北三省，我党领导的东北抗日队伍与　　这边儿小马更惨，尽管他爱玛力爱得发狂，书没法读