liunx 防火墙命令
- 查看防火墙状态
systemctl status firewalld

- 开启防火墙
systemctl start firewalld
- 关闭防火墙
systemctl stop firewalld
- 开机启动防火墙
systemctl enable firewalld.service
- 开机关闭防火墙
systemctl disable firewalld.service
systemctl status firewalld 
systemctl start firewalld
systemctl stop firewalld
systemctl enable firewalld.service
systemctl disable firewalld.service