NAS not accessible

Hello,
at the moment I am unable to access my second NAS (TS-251) via the assigned IP (static IP) in the Firefox browser (latest version/Win 11Pro up-to-date, computer with Kaspersky Premium protection).
– My first NAS is accessible. My router (AVM/Fritz!OS/latest) recognizes both NAS devices
– Qfinder allowed me to access the NAS and update firmware and software
– The (basic) settings are the same for both NAS devices…
What do I need to configure in Firefox so that it allows access to the NAS?

Please always post in the correct language category.

What exactly happens when the NAS IP is accessed in the browser?

===translated to German by Dolbyman===

Ein paar Fragen:

  1. Wird die IP-Adresse des NAS in Qfinder korrekt angezeigt? Ich denke schon, möchte aber sichergehen.
  2. Kannst du die Eingabeaufforderung öffnen und die IP-Adresse des NAS erfolgreich anpingen?
  3. Hast du den Browser-Cache geleert oder anderen Browser auf dem Computer ausprobiert? Funktioniert es damit?

Hello,

Actually, nothing.

I’ve never had any problems accessing my NAS with Firefox.

I always enter

http://192.168.x.xx:8080/cgi-bin/

Maybe try using Firefox’s private mode.