• 查看防火墙某个端口是否开放
      firewall-cmd —query-port=80/tcp
    • 开放防火墙端口80
      firewall-cmd —zone=public —add-port=80/tcp —permanent
    • 关闭80端口
    • firewall-cmd —zone=public —remove-port=80/tcp —permanent
    • 配置立即生效
    • firewall-cmd —reload
    • 查看防火墙状态
      systemctl status firewalld
    • 关闭防火墙
      systemctl stop firewalld
    • 打开防火墙
      systemctl start firewalld
    • 开放一段端口
      firewall-cmd —zone=public —add-port=8121-8124/tcp —permanent
    • 查看开放的端口列表
      firewall-cmd —zone=public —list-ports

    firewall-cmd —zone=public —add-port=80/tcp —permanent