UFW is one of those tools that looks almost too simple. You type a few commands, allow SSH, deny incoming traffic, enable the firewall, and suddenly your Linux home server feels more serious. But then the real questions start: Should I allow a port from everywhere or only from my LAN? Should Docker services be exposed? Should outgoing traffic be blocked? How do I avoid locking myself out of SSH? What rules actually make sense for a home server? This post is a practical guide to UFW firewall rules for home servers . Not enterprise firewall theory. Not copy-paste paranoia. Just useful rules for a Linux box running at home, probably doing too many things, and hopefully not exposing random ports to the whole internet. UFW means Uncomplicated Firewall . Ubuntu describes it as the default firewall configuration tool, designed to make host-based firewall management easier. By default, UFW is usually disabled until you enable it. That last part matters. Installing...