Haven’t used it myself but you could give https://rustdesk.com/ a try.

“How I get a reliable ssh connection” and “What I do with the SSH connection once I have one” are two entirely different things, autossh does the first, my comment was about the second.

OpenSSH also has a built-in tunnel that is more general (-w Parameter) than just port forwarding.

You should be aware that a large number of mail hosters will block all mail from your server merely because it is sent from a dynamic IP address.

If you don’t have a DB or the ability to store data in general none of the open source analytics software will work either.

I was under the impression that there is only one Matrix server implementation. Standards are not really required in that situation.

Regular updates are definitely necessary too. Also, if you do limit SSH users to a chroot make sure you limit TCP (port) forwarding too.

It might be worth mentioning which xmpp implementation you are actually using for your server if you expect anyone to help you. Also in general, more details about your hosting setup, how you installed it, did you follow any tutorial or use any particular installer (e.g. Helm chart on Kubernetes), possibly if you made any changes to the config,…

Borg is also supported by Hetzner Storage Boxes

Oh, all my drives are RAID too, mostly for the convenience of being able to use them while I order a replacement for a failed drive and not having to restore from backup once I get that.

They are anything but small. They are probably one of the biggest German hosting companies out there.

How do you handle the cache invalidation issue with Borg when backing up multiple systems to one repo? For me if I access a Borg repository from multiple computers (and write from each) it has to rebuild the cache each time which can take a long time.

RAID is not backup. Many failure sources from theft over electrical issues to water or fire can affect multiple RAID drives equally, not to mention silent data corruption or accidental deletions.

Ideally you want to backup everything that you didn’t explicitly exclude since otherwise there is always something you forgot.

I have just been using Borg with a Hetzner Storagebox as the target. That has the advantage of being off-site and not using up a lot of space since it deduplicates. It also encrypts the backup. It might take a while for the initial backup at 24TB though depending on your connection.

My point was more that there are likely fewer people who bought them new so that would limit the availability of used drives of that size.

People might also replace a 4TB HDD with a 2TB NVMe or SSD if they value speed over capacity.

Are there even that many people still buying HDDs that small considering SSD and NVMe are not that much more expensive and a lot faster?

It is enough to put it into its own network namespace.

If you want to use a filesystem that is so bad that it doesn’t even have journaling you need to manually select it. None of them have been using one of those by default for 10-15 years now.

Maybe on some distros that is the case if you install a recent version but to get a non-journaling filesystem you literally have to partition manually to avoid using one on any distro that is still supported today and meant for full sized PCs (as opposed to embedded devices).