zedt.eu
How to install OPNSense on PCEngines' APU2 · theZedt
I have been looking for a good alternative which could handle my gigabit internet connection and I believe I made a good choice going with PCEngine's APU2 embedded system. I tried following various tutorials dedicated for installing both pfSense and OPNsense on this device, however they didn't quite work on the APU (or in my case), so I tried a personal method which proved successful.