Hello,
just a question: is possible to install OPNsense into a WatchGuard xtm530 ?
Thank so much
Best regards
Dario
Yes, it works fine.
You should update the BIOS to an unlocked version (search with Google, you will find guides mentioning pfSense).
then, probably the best is to install a SSD or HDD and install using an USB Stick.
Alternatively you can install it to a CF card.
You should also upgrade the CPU, as it is slow (Celeron) and RAM.