Strange lockup

[pseudonym3k]

Just a simple home user here. Protectli VP4630 (32G memory and 1T SSD) and OPNsense, upgraded to 24.1.5_3-amd64 yesterday 4/7.

TLDR; I have no clue if the odd "lockup" issue I experienced rests with OPNsense or Protectli vault. If OPNsense I don't even know if it was this latest update or that's just a coincidence. I know too little to troubleshoot very well and I've already recovered from it and all is good again. So I don't need any help - just want to put this out in case it resonates with anyone.

Simple network: 1 WAN, 1 LAN. Spectrum provided Cisco modem into WAN. Unmanaged switch in LAN port. Wired devices and a wireless AP plugged into switch (One Eero 6+ in bridge mode as the AP). No issues for 5 months.

As mentioned, ran manual update yesterday to OPNsense and everything went fine. About five hours later, wifi disappeared. Checked the Eero - "red light" - disconnected. Eero has been a POS for me so I assumed it was Eero and started researching how to fix. Everything pointed to internet down but modem idiot lights looked good and Spectrum app reported it was up, and anyway I should still have a network just no internet if that was the actual issue. Too much time wasted there but I learned some things.

Finally dawned on me to check a wired desktop (plugged into switch and bypasses Eero) and it had no internet. So not the Eero. Apparently no local network either as it couldn't reach any other wired computer nor bring up the OPNsense webpage.

Tried power cycling modem, protectli, wired computer - no change. Put protectli on a monitor, keyboard, mouse. Got the OPNsense console upon power on, and OPNsense found my IPV4 address from my modem (my ISP has never served an IPV6). Nothing configured on LAN port.

Tried factory reset from console. Assigned WAN, LAN ports and now LAN port had IP range, nothing found for WAN IP. (made sure ports were correct to cables as I've seen the factory reset puts LAN on first port then WAN by default, I assign WAN on first then LAN)  I don't know how many times I tried to get this part working... and failed miserably.

Tried restoring from backup to no avail as well. No joy.

Now I wondered if my modem was broken? Back to Spectrum app, still says modem is working well. Restarted modem from the app which also does a reset (I could have used the reset hole on the modem but it is fidgety). Power cycled protectli while waiting for modem to come up, then another factory reset.

This time it all worked. And the kicker - the modem was now serving an IPV6 address. I have had IPV6 disabled on all prior routers (right or wrong, not here to debate that) and so I had disabled all IPV6 services in OPNsense when I first set it up, since I've never had an IPV6 address from Spectrum ever before.

I have no way to know anything for sure, but I am thinking that by disabling IPV6 in OPNsense, OPNsense got lost somehow when the Spectrum modem began (unsuccessfully until reset/restart?) to serve an IPV6 address. I confirmed with Spectrum that change was made yesterday.

It is certainly an edge case if that's what happened, just want to mention anyway.