Thanks for the explanation. That part is clear, and I can access the server/Mac computer from my iPhone using the 100.x IP address. But if I’m on cellular I need to have Remote Access Settings enabled in order to connect.
Edit: Actually on Wifi too on the same local network I need remote access enabled if I’m using the 100.x IP addresses. Using the usual IP pre-Tailscale I don’t need remote access on wifi.
Not quite sure I followed all that. I’ve disabled a specific white list for now. When I have access to another computer I will confirm I can’t connect unless I am running Tailscale with the appropriate IP addresses.