Hello, I’m a beginner so it might be trivial but I don’t know, please explain what the entry in the configuration menu PORTS>802.1X means : “The RADIUS page is used to create and manage radius servers” at RUT241 Ports - Teltonika Networks Wiki
Does this mean that it creates a radius server locally on the RUT241 router or only a connection to the radius server on the given IP?
You will need to have a RADIUS server already running elsewhere on your network. You can configure the RADIUS settings page to tell your router how to locate and connect to it.