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校场职场，灌婴策马而来，在大纛前停下道：禀报韩元帅，大军已经集结，随时可以出发。一名普通复员军人在偶然间发现保卫几百万人口生命的防洪大堤被一伙不法商人、黑社会、腐败分子做成“豆腐渣”工程后，勇敢地揭发并与这群人斗争到底，最后保住了该市几百万人的生命……默默地听董翳禀报，一颗心陡然沉到谷底。Some people think that:Well, we've reviewed the concept of rules, And it has been understood that, A rule consists roughly of two logical units, Match conditions and actions, It is useless to say so much, Let's define a rule by hand. Here, we still take the INPUT chain in the filter table as an example, because the filter table is responsible for the "filtering" function, and if all messages sent to the local machine need to be filtered, they will first pass through the INPUT chain (PREROUTING chain has no filtering function), which is very similar to the "entry" scenario we refer to. Therefore, using the INPUT chain in the filter table as an example is helpful for us to understand.[Implementation Time]: 20040301