UFW Firewall Basics: Secure Your Linux Server
Secure your Linux server with the UFW firewall — simple and effective on Ubuntu/Debian.
Step 1: Enable UFW
Run ufw enable to activate the firewall. Default deny incoming, allow outgoing.
Step 1: Enable UFW
Step 2: Allow Required Ports
Allow SSH before enabling: ufw allow 22/tcp. Then allow web: ufw allow 80,443/tcp.
Step 2: Allow Required Ports
Step 3: Check Firewall Status
Run ufw status verbose to verify active rules.
Step 3: Check Firewall Status
ufw deny from 203.0.113.0/24
ufw reset # caution: removes all rules
Terminal screenshots are original illustrations created for Gnome IT Solutions (blog.gnomeitsolutions.com).