# list allowed ports
sudo ufw status verbose

# show ufw status
sudo ufw status

# show and allow by application name
sudo ufw app list
sudo ufw allow 'Nginx HTTP'
sudo ufw allow 53/tcp
sudo ufw allow 6000:6007/tcp
sudo ufw allow from 8.8.8.8
sudo ufw allow from 8.8.8.8 to any port 22


# show rule raw
sudo ufw show raw

# Default Policies
sudo ufw default deny incoming
sudo ufw default allow outgoing

# service enable
sudo ufw enable