pfSense on WatchGuard XTM 810

bdario58

Hello folks,
firtst of all I'm sorry for my poor english.
I just got a couple of firewall WatchGuard XTM 810 and my target is to install PfSense on it (better on hard disk).
In a previous post Steve wrote that it's pretty easy these days because pfSense will boot completely with em NICs and it's trivial to enable the console on com2 showing a couple of links:
[https://forum.netgate.com/topic/55986/watchguard-firebox-xtm-8-series/212]
[https://forum.netgate.com/topic/55986/watchguard-firebox-xtm-8-series]
Obviously I read their content but I'm very confused, I don't understood how enable COM2, where is written the /boot/loader.conf.local file?
I'm using a CentOS 8 or Windows 10 clients (double boot) and none of them natively mount the UFS file system, so I can't seek/modify the /boot/loader.conf file and before installing any software I would like be sure to move on the right way.

For your knowledge:
I tried following this three base steps:

In a Compact Flash 1 GB I wrote pfSense-CE-memstick-serial-2.5.2-RELEASE-amd64.img
I connected a 500 GB hard disk in the WatchGuard XTM 810
I booted the WG and pfSense start but after a bunch of seconds it stops run (I used the original one, is perhaps the compact flash too small?)

Thank so much for your invaluable help.
Best regards.
Dario

stephenw10

Dupe post. Solved here.