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大伙这才吐着舌头偷笑。Netfilter/iptables (hereinafter referred to as iptables) constitute the packet filtering firewall under Linux platform. Like most Linux software, this packet filtering firewall is free of charge. It can replace expensive commercial firewall solutions and complete the functions of packet filtering, packet redirection and network address translation (NAT).Example 1? Only one "visibility parameter" is used in this example, instead of "action". In this example, "parameter" is added first, then "action" is added, and "action" is bound to "parameter". Of all the "parameters" of dynamic blocks, only "visibility", "alignment" and "base point" do not need to bind "actions", and the others need to bind "actions".In the last article, we explained Redis' master-slave cluster mode in detail. In fact, the configuration of this cluster mode is very simple. It only needs to be configured on Slave's nodes. The configuration of Master's master node does not need to be changed. However, one thing is that the persistent configuration of Master and Slave nodes should be consistent as far as possible, otherwise there will be strange problems. Starting today, we will begin to talk about the second mode of Redis cluster mode. That is, the "Sentinel" mode, which was provided from version 2.6 of Redis, but the mode of this version was unstable at that time. The Sentinel mode did not stabilize until version 2.8 of Redis. In the production environment, if you want to use the Sentinel mode of Redis, you will try to use the version after version 2.8 of Redis. Whether it is master-slave mode or sentinel mode, both modes have a problem and cannot be expanded horizontally, and the high availability of these two modes will be limited by the memory of Master master node. Another point is that the configuration of Sentinel mode is not simple or even complicated, so neither mode is recommended in industrial scenes. If you want to use it, you must have solutions to related problems to avoid subsequent problems.BBC宣布续订第11季。SBS新月火剧《 虽然30但仍17 》讲述了前程似锦天才小提琴演奏者宇徐丽在花样年华17岁刚要进入优秀的音乐大学念书之前，突然遭遇了火灾失去了意识在医院昏迷了13年突然醒过来变成了30岁而发生的故事。申惠善剧中饰演天才小提琴演奏者宇徐丽一角，梁世宗剧中饰演舞台设计师孔友真一角，非常有实力，但是他过去也有着凄惨的事故遭遇，他在无所事事的时候就过着放浪不羁的生活。《她很漂亮》编剧的新作，预计接档《油腻的Melo》7月播出。