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By default, the changes we make to the "firewall" are "temporary". In other words, when the iptables service is restarted or the server is restarted, the rules we normally add or the changes we make to the rules will disappear. In order to prevent this from happening, we need to "save" the rules.Sister Ping heard the old people say that it was the first time that when decocting herbs, she found that the boiled juice would make cotton yarn stained with color stains, thus people realized that the juice of plants could be used as dyes. So we began to test dyeing, taking all kinds of flowers and plants, colored rhizomes and bark to extract dye solution.In fact, iptables is not a real firewall. We can understand it as a client agent. Users execute the user's security settings into the corresponding "security framework" through iptables. This "security framework" is the real firewall. The name of this framework is netfilter.The reusability of the algorithm is poor. If there are similar algorithms in other places, but the rules are different, our codes cannot be used universally.Jeerawat（Jee）是一个表面光鲜亮丽的女明星。但Jee的童年其实很不幸，因为Jee的母亲抛下她给外婆，嫁给了一个有钱有势的新丈夫。而Jee非常不喜欢这位继父，因为他总是找机会威胁和骚扰Jee，所以Jee经常借酒消愁。七十年代，城市知青马杰（文章 饰）来到西北某农村插队，被村里漂亮种驴——黑六的叫声吸引。马杰嫌黑六不让他骑，某次工伤在诊所缝针时偷了麻醉剂打给黑六，队长大莲（岳红 饰）以为黑六生病，心急如焚。马杰奇迹般地“治愈”了黑六，赢得大莲和队里的信任，成为牲口饲养员。马杰一边喂驴，一边偷偷与村里的女青年彩凤（白静 饰）相恋。与此同时，马杰对黑六只配种不干活的特殊待遇愈发不满，并对大莲“驴比人值钱”的论调暗自气愤，发泄中竟打坏了黑六的“命根子”。无法配种也不能干活的黑六被马杰宰杀，却没曾想黑六的弟弟，毛驴黑七，从此与马杰不共戴天。人与驴的斗争愈演愈烈。