What it does
UFW, the Uncomplicated Firewall, is a command-line program for managing netfilter firewall rules.
UFW is useful when a Linux administrator wants a short command-line route to host firewall policy. The official project describes it as a netfilter management program rather than an independent network appliance. Write down the services that must remain reachable before enabling or changing a remote host's rules. Keep an authorized recovery path available while evaluating them. Its simpler interface does not remove the need to understand which addresses, ports and directions a rule permits.
Strengths
- Focused command-line firewall management
Best for
- Administrators setting a straightforward Linux host policy
Sources
- ufw in Launchpad (Oct 26, 2026)