There's a small chance that the new network cards arrive at the host this Friday. I've told them to give me heads-up, but that they can go ahead and turn off the server gracefully I'm not there to do it.

So if the site does go down for a while (or longer, if some services fail to auto-start) then that's the reason. I'll be checking what the status is after I get off from work.

Certificate had expired, it has now been renewed.