防火墙

# 开启
systemctl start firewalld 
# 重启
systemctl restart firewalld.service
# 关闭
systemctl stop firewalld.service
# 禁止firewall开机启动
systemctl disable firewalld.service 

#查看firewall服务状态
systemctl status firewalld
firewall-cmd --state

#查看防火墙规则
firewall-cmd --list-all