Ubuntu UFW Firewall Setup and Basic Rules

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Network Security Markdown

UFW is Ubuntu's user-friendly interface for host firewall rules. Allow SSH before enabling it on a remote server.

Basic setup

sudo ufw allow OpenSSH\nsudo ufw allow 80/tcp\nsudo ufw allow 443/tcp\nsudo ufw enable\nsudo ufw status numbered

When you have a stable management IP, limit SSH to that address. Keep the current session open while testing.

Review numbered rules, remove obsolete entries and enable logging when needed. A firewall complements updates, strong authentication and monitoring.

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