Updated: 10 July 2025
List application profiles registered with ufw
ufw app list
Enable the firewall
ufw enable
Check status
ufw status verbose
Find a rule and delete it
sudo ufw status numbered
sudo ufw delete 2
Open port 9003. This may resolve a Xdebug: [Step Debug] Time-out connecting to debugging client
error
sudo ufw allow 9003
Sample commands when setting up a new server
sudo ufw status verbose
sudo ufw app list
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
sudo ufw status verbose