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System Configuration ubuntudebian beginner

Configure UFW Firewall

Enable UFW and allow SSH/HTTP/HTTPS ports

Overview

Enable UFW and allow SSH/HTTP/HTTPS ports

Commands

This will enable UFW and open ports 22/80/443, continue?

sudo ufw allow OpenSSH
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw --force enable

Use Cases

Security initialization for new servers, prevent exposure of unauthorized ports.

Prerequisites

Ensure SSH port (22) is open, otherwise remote connection will drop.

FAQ

  • Cannot connect to the server after operation → recover via VNC/console
  • View rules → sudo ufw status numbered
  • Ban IP Address
  • View Listening Ports