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Here are the steps for configuring iptables-service in centos7　　顶尖杀手艾娃效忠于一个神祕组织，在全球各地执行高价值目标的暗杀行动。然而，一次出了差错的行动，让艾娃身陷生死危机。面对各路杀手铺天盖地的追杀，无路可退的艾娃唯有杀出血路，才有活下去的机会…稍做思索过后，归还文书，冲胡宗宪恭恭敬敬道：本县牢房充足，若有需要，可暂关于此。Since both Redis servers are installed on the Linux operating system, and the two Redis servers will switch when the Master master server fails, it must be ensured that the port numbers of the two Redis servers have been added to the firewall, or the firewalls of the two Linux operating systems have been shut down, otherwise Master-link-Status: down will be prompted, and Master master server is not connected. There are two solutions: the first is to shut down the firewalls of the two Linux operating systems; The second method is to add the port number of each Redis service to the firewall to allow communication through the port number. You can use the command "firewall-cmd-query-port=6379/tcp" first. If the result is No, you can continue to execute the following command "firewall-cmd-add-port=6379/tcp". After the command is executed, you will return Success, indicating that the increase was successful. In this way, Redis servers on the two Linux systems can be switched smoothly to perform sentinel mode operations.到时候，朕会以亲长身份而不是皇帝身份在一旁作证。Use-t to specify the table to operate on, and the-P option to specify the chain to modify. In the above example,-P FORWARD DROP means to change the default policy of FORWRD chains in the table to DROP.正恶狠狠地想着，就听瘸腿秋霜叫道：大哥，大嫂，你们来了？这个是谁？王大郎哆嗦道：你……你是谁？谁是……你哥？熊氏也指着她大叫道：你干什么扮成我妹子模样？瘸腿秋霜惊道：我是秋霜啊嫂子。