🛡 How to Configure UFW on Linux VPS

UFW (Uncomplicated Firewall) is a user-friendly tool for managing a firewall on Linux. It's perfect for basic VPS protection and is beginner-friendly. In this guide, we'll show how to enable, configure, and use UFW on Ubuntu/Debian servers.

🔧 Installing and Enabling UFW

• Install UFW (if not already installed):
  sudo apt install ufw
• Check UFW status:
  sudo ufw status
• Allow SSH before enabling:
  sudo ufw allow ssh or sudo ufw allow 22
• Enable UFW:
  sudo ufw enable

📌 Basic UFW Commands

• Allow a port:
  sudo ufw allow 80 (HTTP), sudo ufw allow 443 (HTTPS)
• Deny a port:
  sudo ufw deny 21
• Remove a rule:
  sudo ufw delete allow 80
• View current rules:
  sudo ufw status numbered
• Disable UFW:
  sudo ufw disable

🚨 Security Tips

• 🔐 Do not block port 22 or you’ll lose SSH access.
• 📋 Only allow necessary ports: 80/443 for websites, 3306 for MySQL (if needed).
• 🧪 Test your site and services after enabling the firewall.