UFW Usage

Enable and disable

sudo ufw enable
sudo ufw disable

Check the status of UFW

sudo ufw status verbose
sudo ufw status

Add rules

sudo ufw allow 53
sudo ufw allow 53/tcp
sudo ufw deny 53
sudo ufw deny 53/tcp
sudo ufw allow 7100:7200/tcp
sudo ufw allow ssh
sudo ufw deny ssh
sudo ufw allow from 207.46.232.182
sudo ufw allow from 192.168.1.0/24
sudo ufw allow from 192.168.0.4 to any port 22
sudo ufw allow from 192.168.0.4 to any port 22 proto tcp
sudo ufw allow in on eth0 to any port 80
sudo ufw allow in on eth0 from 192.168.0.0/16

Delete rules

Add 'delete' after 'ufw' in the above command.

sudo ufw delete deny 80/tcp
sudo ufw delete allow ssh

Reset

sudo ufw reset