Linux 常用命令：防火墙

# 关闭防火墙
systemctl stop firewalld.service

# 关闭防火墙开机自启动
systemctl disable firewalld.service

# 重启防火墙
systemctl restart firewalld.service

# 重载防火墙
systemctl reload firewalld.service

# 开启防火墙
systemctl start firewalld.service

# 开机开启动防火墙
systemctl enable firewalld.service

# 查看防火墙状态
systemctl status firewalld.service

# 放行端口
firewall-cmd --zone=public --add-port=80/tcp --permanent

# 关闭端口
firewall-cmd --zone=public --remove-port=80/tcp --permanent