1.启动防火墙
systemctl start firewalld
2.禁用防火墙
systemctl stop firewalld
3.设置开机启动
systemctl enable firewalld
4.停止并禁用开机启动
sytemctl disable firewalld
5.重启防火墙
firewall-cmd --reload
6.查看状态
systemctl status firewalld 或者 firewall-cmd --state
7.查看端口状态
firewall-cmd --query-port=8080/tcp
8.添加端口开放
firewall-cmd --add-port=8080/tcp --permanent
permanent：添加此项意味着永久生效
添加后需要重启防火墙