CentOS 防火墙常用命令
<div>1.查看防火墙状态：</div><div>firewall-cmd --state </div>
<div>2.启动防火墙</div>
<div>systemctl start firewalld</div>
<div>3.关闭防火墙</div>
<div>systemctl stop firewalld</div>
<div>4.检查防火墙开放的端口</div>
<div>firewall-cmd --permanent --zone=public --list-ports</div>
<div>5.开放一个新的端口</div>
<div>firewall-cmd --zone=public --add-port=8080/tcp --permanent</div>
<div>6.重启防火墙</div>
<div>firewall-cmd --reload</div>
<div>7.验证新增加端口是否生效</div>
<div>firewall-cmd --zone=public --query-port=8080/tcp</div>
<div>8.防火墙开机自启动</div>
<div>systemctl enable firewalld.service</div>
<div>9.防火墙取消某一开放端口</div>
<div>firewall-cmd --zone=public --remove-port=9200/tcp --permanent</div>
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来源：https://www.cnblogs.com/xiaobaixie/p/11210614.html
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