From https://captainduckduck.com/docs/get-started.html
D) Disable Firewall Some server providers have strict firewall settings. To disable firewall on Ubuntu: ufw disable
WTF?
D) Disable Firewall Some server providers have strict firewall settings. To disable firewall on Ubuntu: ufw disable
WTF?
Getting Started section is aimed for beginners. You surely don't have to disable firewalls entirely. There's a section in the docs outlining the ports that are being used by Captain.