永久开启端口
firewall-cmd --add-port=3128/tcp --permanent
查询端口是否开启
firewall-cmd --query-port=3128/tcp
启动firewall
systemctl start firewalld.service
停止firewall
systemctl stop firewalld.service
firewall-cmd --add-port=3128/tcp --permanent
firewall-cmd --query-port=3128/tcp
systemctl start firewalld.service
systemctl stop firewalld.service
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