6 articles

NAT Is Not Security: Obfuscation, Anti-Spoofing and ALG Risk

Why the security attributed to NAT is a side effect of state and policy rather than translation, with a packet-level flow through pfSense, why RFC1918 and bogon blocking are still required, and how ALGs bind firewall pinholes to payload content

Deep NAT OpenVPN Lab Access: Troubleshooting Silent Firewall Failures

A comprehensive guide to diagnosing and resolving OpenVPN connectivity through multiple NAT layers, including the discovery of a critical silent firewall rule loading failure in pfSense caused by broken aliases.

Solving Cloudflare DDNS in Double NAT Environments

How to configure Cloudflare Dynamic DNS when your gateway is behind double NAT and can't detect your real public IP. A PowerShell-based solution for Windows workstations.

Tailscale: The Zero-Trust Network That Changed How I Manage Infrastructure

A comprehensive deep-dive into Tailscale's mesh networking technology, from WireGuard foundations to practical SSH and SMB configurations. Why this zero-trust VPN has become essential infrastructure for modern system administration.

Building a Safe WireGuard Peer Management Script

A comprehensive bash script for managing WireGuard VPN peers with automatic backups, split-tunnel support, and interactive mode for safe infrastructure management.