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Secure is relative, you should be aware that jellyfin itself has security issues https://github.com/jellyfin/jellyfin/issues/5415 most of which are harmless, but at least one is fairly serious and allows people to watch your media without authentication, and adding an extra layer of authentication on the proxy would likely cause issues with clients.
That being said, if you're okay with those security issues what I would do is have a cheap VPS, connect both machines to tailscale, and have something like Caddy on the VPS to do the forwarding.
Just leaving this here
https://github.com/jellyfin/jellyfin/issues/5415#issuecomment-2825240290
Reminds me of
https://everyuuid.com/
It really seems overblown of an issue...
Except most people have almost the same structure because of media organizers like radarr/sonarr. At the very least they should hide that behind a setting to not require auth (since the header should be there for most clients) so only people running an old client would be affected. They could also add an extra salt to that hash or something similar.
I agree, it's not critical, but it shouldn't be hand waved either. And like I said, security is relative, I would argue for most people this is fine, but I still think this should be taken more seriously.
Yeah not only would a lot of people have the same media name, because of docker mounts, probably a lot of people have the same path to the media inside of the docker container even if the external location is different. I bet you could make a rainbow table of sorts of the most popular movie/TV torrents combined with the most common place in the container for media to be mounted, then use shodan to get a list of hundreds of instances that you could scan for the common hashes.
I'm just seeing the issue for the first time and noticed it was raised 5 years ago - surely that was enough time to at least put forward a changeover date and give clients time to update.
Jokes on them, my paths are a shitshow and I can't be bothered to organize them properly
Do you not do any renaming? That probably would make it even easier as you can just brute force with a database of filenames scraped from torrents. I already have a proof of concept that generates valid jellyfin IDs from any given file path, it only takes a few more steps before you can plug in a shodan scan of jellyfin instances and just shotgun a bunch of IDs generated from torrents.csv at them and find stuff you can stream without authentication.
People not bothering to rename, using the default radarr naming scheme, or everyone using the same naming pattern from trash guides just makes it easier.
Probably the only way to guarantee nobody can probe your media and stream it without authentication is to make sure to rename everything using a format that only you use or mount all your media under a path inside docker that contains a long randomly generated folder prefix.
I was mostly making the comment in jest. I do rename, but my folder structures, as someone who downloads everything manually based on what I want to watch rather than doing the automated *arr stuff leaves it in directories only I consider sensible.
I have Jellyfin behind a reverse proxy that lives in a DMZ and a WAF to go with it. I'm sure there's still room for watching an unauthenticated stream because I forgot to rename a folder somewhere, but it's not exactly an attack vector I care about. I'm more concerned about DDoS or impersonation attacks, which I also attempt to mitigate via an LDAP implementation behind the scenes.
It's not perfect, but it's the best effort I can make at the moment.
Yeah that's fair and I think that's a good move, my point is just that people are acting like this is not feasible to exploit. I'm at the point in my exploit testing excursion where I have a script that can generate a stream of potential IDs based on real torrent names being parsed and reformatted using radarr's default naming pattern as well as the commonly used trash guides ones permuted with some common library paths used in the default docker compose examples, and it's turning up actual ID matches with my jellyfin instance. All I have left to do is make it create API requests to test the IDs against the unauthenticated API instead of checking an exported list and there's a proof of concept. 5 years is a long time for someone to figure that out.
Isn’t it hilarious that the best solution to do remote streaming using the free software that people use because they don’t want to pay for a Plex subscription or one-off cost is to pay for at least one subscription, maybe more?
It’s almost like the reason Plex charge money is because it’s not free to do.
What Plex does is closer to having an embedded tailscale client, you can access Jellyfin remotely with tailscale for free, but OP specifically asked for no VPN.
That being said, I'm not opposed to Plex charging for that service, even a tailscale like server costs something to maintain. My gripe with Plex is that it purposefully shoots itself in the foot to force you into their paid service, i.e. it actively tries to isolate itself so you can't access it remotely, which means that it can't run inside a docker container unless you give it network host access, otherwise it only considers other docker containers locals and doesn't let you watch your own content from another machine in the same network.
There’s zero need to run Plex in a docker container.
There's zero need to run anything in docker, it just makes things easier and portable.
Plex server doesn’t need to be “portable”, and running it in docker definitely doesn’t make it easier.
There absolutely are programs that make sense to run in docker, but Plex server isn’t one of them.