Building a Headless OPNsense HomeLab: From Zero to Domain Access

A complete guide to deploying a production-grade firewall with remote management Introduction Navigating the world of home networking can be a "plug-and-play" experience - until you decide to build a professional-grade lab. When I set out to install OPNsense on an Intel N150 fanless mini-PC, I ran into the classic "locked out" scenarios, interface mismatches, and DNS rebind attacks. Here is the definitive guide on how I moved from a broken installer to a fully headless, domain-accessible firewall that I can manage from anywhere in the world. Three days. That's how long it took me to get a working headless OPNsense setup on my Intel N150 mini-PC. Not because OPNsense is hard. Because nobody documents the gotchas . Interface mismatches. DNS rebind protection blocking your own domain. The "Live mode" trap where nothing persists. Plugging in two cables at the wrong moment and watching interface detection implode. I hit every single one. So you don't have to. My Setup ┌─────────────────┐ ┌─