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 ┌─────────────────┐ ┌──