EulerOS, a Linux distro, was certified UNIX.

But OS X, macOS, and at least one Linux distro are/were UNIX certified.

IIRC Torvalds uses Fedora.

(Debian for me.)

Remote backup server would be my suggestion.

Configure it with a VPN to talk to your home network and set it up at a trusted friend’s or family’s place.

I do this with a raspberry pi and an external HDD that takes daily/weekly/monthly snapshots, with daily rsync. Works nicely for me.

I’m guessing it’s because the developers either have a different speciality that they focus on, are employed to support specific hardware, or both.

It’s mostly so that I can have SSL handled by nginx (and not per-service), and also for ease of hosting multiple services accessible via subdomains. So every service is its own subdomain.

Additionally, my internal network (as in, my physical LAN) does not have any port forwarding enabled — everything is over WireGuard to my VPS.

My method:

VPS with reverse proxy to my public facing services. This holds SSL certs, and communicates with home network through WireGuard link configured on my router.

Local computer with reverse proxy for all services. This also has SSL certs, and handles the same services as the VPS, so I can have local/LAN speeds. Additionally, it serves as a reverse proxy for all my private services, such as my router/switches/access point config pages, Jellyfin, etc.

No complaints, it mostly just works. I also have my router override DNS entries for my FQDN to resolve locally, so I use the same URL for accessing public services on my LAN.

Getting TLS certs will be complicated

I just use Let’s Encrypt with a wildcard domain — same certs for public and private facing domains. I’m sure this isn’t best practice, but it’s mostly just for me so I’m not too worried :)

Yeah I don’t expose Jellyfin over the Internet, so it doesn’t matter for me, and wouldn’t work at all over WAN (unless VPN’d to home network).

Also, it’s all reverse proxied, and there’s nothing preventing having two Jellyfin hostnames, e.g., jf-local.mydomain.com and jf-public.mydomain.com.

Another fun trick you can play is to use a private IP on your public DNS records. This is useful for Jellyfin on Chromecast for instance — it uses 8.8.8.8 for DNS lookup (and ignores your router settings), so it wants a fully qualified domain name. But it has no problem accessing local hosts, so long as it’s from 8.8.8.8’s record.

I have set up local DNS entries (with Pi-Hole) to point to my srrver, but I don’t know if it possible to get certs for that, since it is not a real domain.

So long as your certs are for your fully qualified domain there’s no problem. I do this, as do many people — mydoman.com is fully qualified, but on my own network I override the DNS to the local address. Not a problem at all — DNS is tied to the hostname, not the IP.

The only flaw in Corel’s logic was that as soon as you’re running Linux, you lose all desire to run WordPerfect, and develop an irresistible need to align yourself with vim or emacs…

I think (?) it’s generally true that the root user should never mess with users’ files.

Imagine your home directory is shared across many systems on a network (my alma mater did this). It would be really bad if a sysadmin for alpha.university.edu removed a program, and suddenly your personal settings were removed from beta.university.edu — even though that computer still has the program.

This is one of the “UNIX on the desktop” issues — a lot is designed for a sysadmin/multiuser situation, and it has some gotchas when using it as a desktop machine (I’m used to/really appreciate the directory structure and settings management at this point, but it may take some getting used to).

Any chance you have a DMZ set up on your router?

On your router, are there any settings specific to any host (other than the server maybe)? For example, a static IP or a port forwarded rule.

Do you have a VPN on the phones? Can you traceroute from your phone to the server and post that? (I like PingTools for Android.) You should have 1 hop (you -> server, nothing in between).

Can you verify that you are on the same wifi including same wifi channel? Phone on 5GHz but Linux box on 2.4GHz, for example.

Some mobile clients make it easy to accidentally downvote. I sometimes see that I accidentally downvoted a comment from time to time.

PingTools has been useful for me (though I mostly just use it for iperf).

Right, I just meant that you can’t sudo cat file > /dev/sda but you can sudo dd ..., because IO redirection isn’t elevated to root with sudo. I’m not saying anything too profound :)

Compiling a kernel yourself isn’t a big deal these days, especially with DKMS. Generally the type of people I’ve encountered who care about which kernel version they’re usiyare the type of people who are capable of compiling it themselves…

One caveat is that you will need write access to the drive, which probably means you need to run as root — can’t run that with sudo as-is, unlike dd.

Also a super useful tool for measuring real world bandwidth, both on physical media and over the network ( dd status=progress ... | nc ...).