Getting an Old Swisscom TV Box to Work with Jellyfin

I have an old Swisscom TV box that I wanted to use as a Jellyfin client. What should have been a simple project turned into a frustrating debugging session.

The Problem

The box simply couldn’t connect to my Jellyfin server. The frustrating part: No error message. Just nothing.

My setup: Jellyfin runs on a public server in Docker, with Nginx Proxy Manager handling the certificates.

I tried everything:

• Different URLs
• Direct connection via public IP
• Various Jellyfin settings

Nothing worked.

Searching for a Solution

There’s barely any information about this problem online. I searched for a long time and was about to give up.

Then I finally stumbled upon a small forum post that mentioned ECDSA certificates as a possible cause. Old devices like the Swisscom TV box often have SSL libraries that are simply too old for modern ECDSA certificates.

The Solution

So I had to switch from ECDSA to RSA. My first thought: I can probably change this in Nginx Proxy Manager.

Unfortunately not. This feature wasn’t implemented in the UI.

But: Since Certbot runs inside the container, I could do it directly there. The solution was to manually generate an RSA certificate instead of using the automatic ECDSA certificate.

After the switch: Everything works perfectly.

Conclusion

Sometimes the most obscure problems hold you up the longest. No error message, barely any documentation online, and the solution is hidden in a small forum post.

If anyone has the same problem: Check your certificates. Old hardware and ECDSA often don’t get along.