librenms v26.5.1 and higher requires APP_TRUSTED_PROXIES to be set when using reverse proxy + HTTPS

[Aterfax]

See: PR #566

Change default APP_TRUSTED_PROXIES to 127.0.0.1 (#​19537) - murrant

This will/has caused breakage for users of the docker image who have not configured a specific docker network range and/or setting the APP_TRUSTED_PROXIES= value correctly when using a reverse proxy for HTTPS.

Without the value set correctly, LibreNMS will ignore the upstream proxy $scheme value and fall back to setting all page links/references to use http protocol which breaks the UI styling etc... (even if the reverse proxy has a 301 redirect set for http --> https).

[murrant]

Correct, this is very important. Make sure you set it to the IP(s) of your proxies and not *. Everyone should have received a notification in LibreNMS last month.