After a long time, the technical problems with the remote access to Nautos have been solved.
It runs via Shibboleth. All you need are your normal login data for the TH IT account (same as for "Lernraum").
Here is the link:https://nautos.de/api/v2/Auth?tenantKey=PBQ&login=saml2&IdpId=0
When you are connected to the wifi of the TH, you can still use this link: https://nautos.de/PBQ/login