firewall - ITNotes

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Cloudflare Tunnel: Securely Expose Internal Services Without Opening Firewall Ports

March 27, 2026

Picture this: It's 2 AM, and you need to expose an internal service. Opening firewall ports is a massive security risk, but Cloudflare Tunnel offers a secure, port-free solution. This guide details how to set it up, allowing you to safely publish web apps and SSH without compromising your network.

HomeLab

Supercharge Your Home Network: Building a Powerful Router & Firewall with pfSense/OPNsense

March 22, 2026

Tired of your consumer router's limitations and security gaps? Discover how pfSense or OPNsense can transform your home network into a robust, secure, and highly configurable powerhouse, ideal for any HomeLab enthusiast. This guide covers essential setup, key features, and practical configuration examples.

Security

How to Set Up a Firewall with UFW / iptables for Linux Server Security

March 12, 2026

My server recently survived an intense SSH brute-force attack, reinforcing the urgent need for strong security. This tutorial walks you through setting up UFW, the Uncomplicated Firewall, to defend your Linux server from unauthorized access. Learn to configure crucial rules and maintain a secure system.

Networking

A Practical Guide to Configuring a Linux Firewall: iptables vs. nftables

March 9, 2026

Secure your new Linux server by setting up a firewall. This guide explains why a firewall is essential, compares the classic iptables with the modern nftables, and provides a production-ready nftables configuration to get you started.

Networking

Fail2Ban: Automatic Brute Force Protection for Linux Servers

March 6, 2026

Fail2Ban automatically blocks IP addresses that repeatedly fail authentication, protecting your Linux server from SSH brute force and web attacks. Learn how to install, configure, and tune it with practical tips from hands-on server hardening experience.