I didn’t really find similar issues in the forum.
I have Nextcloud and with dietpi-letsencrypt a certificate with the HSTS [OFF] option installed.
Security & setup warnings by Nextcloud:
AppAPI deployment daemon
E-Mail-Test
PHP-Module
PHP Imagick-Modul
Created an account with admin nextcloud e.g. > test <
In the LAN I reach Nextcloud with https://dietpi_ip/nextcloud/login
with desktop / browser and smartphone / browser
and can also log me into the account > test <.
From the internet with a mobile smartphone I reach Nextcloud with https://my_domain.de/nextcloud.
But I can’t log into the account > test <.
In addition, I cannot create an account from the LAN with the following Android apps:
Nextcloud (Android) FDroid Version 3.34.1 and
Nextcloud Notes (Android) FDroid Version 4.5.2 and also not with
DAVx5 (Android) FDroid Version 4.5.6.1
Should I repeat the Letsencrypt certification with dietpi-letsencrypt with the HSTS [ON] option?
Maybe someone else has these difficulties.
The interplay of Nextcloud and Smartphone is important to me.
Thanks for a support.