whatis ufw
UFW
Also known as: Uncomplicated Firewall
Uncomplicated Firewall, a simple front end for Linux firewall rules, default on Ubuntu, using commands like ufw allow 443/tcp.
What Is UFW in Linux?
UFW turns short commands into nftables or iptables rules. You set default policies, allow the services you need by port or app profile, and enable it.
Be aware that Docker publishes container ports by inserting its own rules, which bypasses UFW. Bind published ports to 127.0.0.1 or use a reverse proxy to keep them private.
Example
sudo ufw allow OpenSSH
sudo ufw status numberedLearn more about UFW
- Linux Firewall Basics Linux firewalls control which network traffic is allowed in and out of your system. This guide covers the concepts, ufw for simple setups, and an introduction to the underlying nftables rules that power them all.
Related tools
- ufw Rule Builder Build ufw firewall rules with allow/deny/limit actions, source restrictions, and comments.