Opnsense 24.7 won't boot with secureboot enabled on fujitsu FUTRO S920

[VREDFOX]

Greetings, recently an ssd died in my fujitsu futro s920 which worked for the last few years as my firewall. As I installed a new ssd I've noticed that the system was UEFI and had a secureboot option (I missed it when I first installed opnsense years ago). While browsing forums I've encountered multiple posts urging not to disable secureboot when running opnsense, so i tried to enable it and install opnsense. The installation finished without issue but when the system rebooted I was greeted with the memory diagnostic program (the last time I saw it starting was when the ssd died and the system had not storage at all) as I checked boot options menu the opnsense ssd was missing. After disabling secureboot the system booted normally.

For installation I used the dvd iso on an ventoy bootable flash with gpt and secureboot compatibility enabled, After that I created  a bootable usb with etcher and tried to install, but was greeted with a error message "secure boot violation, invalid signature detected" I made sure to select the UEFI option when booting from usb.I have tried to install opnsense on a  UEFI virtual machine with secureboot from the usn created and it installed and booted without issues.

As Iwas looking fro a solution I've found this tread https://www.reddit.com/r/OPNsenseFirewall/comments/10a69d6/uefi_on_fujitsu_s920/  After trying this method the boot option reappeared but boot stopped with  error  "secure boot violation, invalid signature detected"

Unfortunately I have limited experience with UEFI and secureboot. Also how dangerous is to run opnsense without secureboot?

[Patrick M. Hausen]

You cannot run it with secure boot at all. Disable it.

[VREDFOX]

So the installing and running opnsense as I did the first time was the correct way to go,OK. Thank you for the quick reply,