Nitrowall: Boot from USB


I want to install a fresh OPNsense on the Nitrowall. I Have a USB stick which boots fine on other PCs. When I plug the USB stick into the Nitrowall it boots the default OPNsense from the internal SSD. How can I configure the Nitrowall to boot from the USB stick?

Hitting ESC during startup gives this…

I am clueless how to proceed. Any suggestions?

This is a bit tricky after you press ESC you need to press 2. . If you Spam ESC it defaults to option 1. So it’s a timing thing

That hit the mark. Thanks. Waited roughly 5 sec and hit ESC once.