OPNSense constantly rebooting itself

[ToasterPC]

Hello there!

I am trying to run OPNSense 23.1 within Proxmox 7.4-3 using a bridge adapter for both WAN and LAN, but for some reason I am unable to get the VM running for more than 5 minutes at a time, and I'm honestly not sure where to begin diagnosing the problem.

I'm using the same connection as with my previous router (a Raspberry Pi 4B running OpenWRT), and honestly, I'm pretty stumped on how to continue, given that even PPPoE dialing seems to prove difficult for the machine now that I've moved over.

While I'm aware I should be providing logs, I'm not sure which ones would be useful for diagnosing this issue, so please let me know what I need to provide so I can post it and begin troubleshooting.

As an aside, the very same instance of Proxmox is running a VM with Home Assistant OS, and so far, it's been running uninterrupted since installation, so I'm pretty sure the issue would lie with either how I configured the OPNSense VM or the guest OS itself.

In any case, thanks for the help!

[Vintage0765]

I am also experiencing this issue, were you able to get this resolved?  Its a brand new OPNSense install from OPNsense-23.1-OpenSSL-dvd-amd64.iso.bz2.

Reboots persist no matter if its UEFI or SeaBIOS, Q35 or i440.

[Vintage0765]

I may have solved it:

I had (accidentally?) installed "Proxmox VE Monitor-All" from https://tteck.github.io/Proxmox/

It monitors all the VM's for their status and reboots them if its not responding.  Since OPNSense does not have a QEMU agent installed, it see's it as not responding and "resets" the VM.  Running the script again gives the option for uninstalling it, which solved my issue.