The UFW firewall setup on your Kubuntu system was the cause of the problem. By default, UFW might prevent other networked devices from connecting. Allowing connections from within your local network range will fix this.
You can achieve this by running the following command in your terminal:
bash
sudo ufw allow from 192.168.1.0/24 to any port 3344
Replace 192.168.1.0/24 with your actual local network range, if it differs. All devices on your local network can now access the Repetier-Server's web interface on port 3344 thanks to this command.
After updating the firewall rules, you should be able to access the Repetier-Server web interface from your Windows machine. To apply the changes, don't forget to reload the firewall:
bash
sudo ufw reload
It's great to hear that you've resolved the issue and have successfully expanded your printer farm!
