1，查看防火墙状态
systemctl status firewalld.service
2，开启防火墙
systemctl start firewalld.service
3，关闭防火墙
systemctl stop firewalld.service
4，禁用防火墙
systemctl disable firewalld.service
CentOS8查看防火墙状态，开启/关闭防火墙
原文：https://www.cnblogs.com/mayg/p/13515305.html
