System lockup

[JDtheHutt]

Good morning,

I've been experiencing an odd issue that I have been trying to resolve and initially thought was due to anything from a fault in OPNsense itself after an upgrade, to the Wireguard package I was using, to my hardware. But now I think it is something else entirely.

I have a basic small home server running Arch Linux which contains mostly media along with some other data, and a bunch of services mostly running in Docker. It's taken over from an old HP Microserver I had, and was originally built since around October 2018. From around that time I have been experiencing severe instability issues with OPNsense in that the whole system would lock up and the webgui and SSH would be unresponsive, I'd lose all networking, and have to reboot to get the system back up. This happens at least once a day, often twice or even more. As I said, I thought there must be a fault and I've been trying to rectify it without success. However, one of the OS drives in my server died end of April and it went offline for around 2-3 weeks. During this time I have had 0 failures on the OPNsense box. I got round to rebuilding the server the other day, with new drives and a slightly modified and fresh build, and immediately the issues have returned, with OPNsense failing twice a day over the last few days.

My main desktop uses Arch as well and hasn't triggered this response from OPNsense. I don't know if this is a hardware or software issue caused by my server or why it would even cause this. Having left it unplugged for a while, the failures stopped occuring. Does anyone have any idea as to why my server might be causing this, spanning two entirely separate installs of both OPNsense and Arch? Any advice would be appreciated. I don't even know what I'd look at log-wise to identify the cause.