Complete Guide on How to Setup a Nextcloud Spreed Signaling Server (i.e. the Talk High-Performance Backend) on Debian (11) Bullseye

This is a comprehensive tutorial on how to setup the High-performance backend for the Talk/Spreed app of a nextcloud instance, using a server that runs on Debian (Bullseye). This tutorial will help you to configure a VPS from scratch in order to run your own TURN and signaling servers, which are ready to also allow access to your video conferences for users behind strict firewalls or NATs.