debian ufw

apt-get install ufw      #安装
sudo ufw status          #状态
   
sudo ufw enable          #启用
sudo ufw disable         #禁用

sudo ufw status verbose  #查看被阻止或允许内容

sudo ufw deny from $IP
sudo ufw allow from $IP
sudo ufw delete allow from $IP
sudo ufw deny from $IP/24
sudo ufw deny in on eth0 from $IP

sudo ufw app list
sudo ufw allow 22
sudo delete allow 22