Oh I’m sorry, I just saw that I made a double post… we also discussed this topic here.
https://forum.turris.cz/t/does-sentinel-also-work-behind-a-provider-router/20165
Yes, it is correct, my Turris establishes a connection via the provider’s router.
We had discussed there that although I am protected, I would only see messages if the Turris was directly connected to the Internet.