Remote access using tailscale in combination with nginx and custom domain remains shown as not secure

Hi,

I have attempted to setup secure remote access over https using tailscale (plugin, not docker app) in combination with NginxProxyManager (docker app) and a custom domain following the guide from spaceinvader one: 3 Different Ways to Connect to Unraid over HTTPS .

It is working in the sense that i can reach my server over the internet (hence when not connected to my home LAN);

of course with tailscale installed on the device that i use to make the connection.

However, the connection remains being shown as 'not secure' and i'm not sure what i did wrong.

Below some screenshots of my configuration:

Containers:

NPM container settings:

Management access settings:

Nginx Proxy Manager settings:

Unifi USG PRO 4 port forwarding rules:

Edited December 27, 2025Dec 27 by rernst