Debian 9操作系统使用UFW工具配置防火墙

sudo apt install ufw

sudo ufw enable

sudo ufw status verbose

sudo ufw stop|start|restart

sudo nano /etc/default/ufw

sudo ufw default deny incomingsudo ufw default allow outgoing

sudo ufw allow 22sudo ufw allow 80sudo ufw allow 443

sudo ufw allow 6000:6007/tcp

sudo ufw allow from 203.0.113.4（修改成实际的IP）

sudo ufw allow from 203.0.113.4 to any port 22

sudo ufw allow from 203.0.113.0/24
sudo ufw allow from 203.0.113.0/24 to any port 22

ip addr

sudo ufw allow in on eth0 to any port 80
sudo ufw allow in on eth1 to any port 3306

sudo ufw status numbered

sudo ufw delete 2

sudo ufw delete allow 80sudo ufw delete allow http

sudo ufw deny from 203.0.113.4