linux 防火墙

查看防火墙的状态

systemctl status firewalld

打开防火墙

sudo systemctl start firewalld

再次查看防火墙的状态

关闭防火墙

sudo systemctl stop firewalld

在防火墙开启时开放具体端口

sudo systemctl start firewalld
sudo firewall-cmd --permanent --add-port=80/tcp
sudo firewall-cmd --reload
sudo firewall-cmncd --query-port=80/tcp