I’ve just made some mess in my NAS network settings (virtual switch) and have lost an access to it. After “short reset” (reset button for 3 sec) Qfinder finds it but combination admin/CloudKey (from the sticker) gives “wrong user/password” message. I am connected directly by ethernet and have o lot of data to reach ;). Any tips&tricks?
TS-453D, QTS 5.2.4.3079, acces from MacOS 14.3
No backups ? …
If neither Cloudkey nor MAC1 work (in case the firmware was not updated) then open a ticket with QNAP support.
Only backups 
That’s the point
Thanks for your help and I’m going to Support ;(
If it’s only backups, then you can restore the data again, worst case … so no worries (if not … then it’s no backup)
I have found the support site with that problem:
I'm unable to log in to QTS and the password reset does not work. What can I do? | QNAP (ES)?
I did some steps (some doesn’t show in Terminal) and finally logged in and changed password. Now I have an access to my NAS but… every app “is stopped. Do you want to start it now?” Of course I want and click OK and nothing happens…
I would re-apply the current firmware, something might have gone bad
I’ve just been through almost same ordeal but with the assistance of QNAP support I fixed it.
I experienced for instance that the CloudKey number from the box sticker dodn’t match with my NAS. I found that out by using the description in section 8 in this link:
For me that didn’t help me login though, as a 10sec reset on the NAS came before I figured this out. I was afraid of the 10sec reset as I have never tried recovering the folder structure prior to this incident, but here after doing it … it was not a big deal.
The sequence was like this being able to login:
- Uninstall the present QNAP FinderPro.
- Do a 10sec reset as directed in the sequence 1 trough 5 in the link above.
When the new installed QNAP FinderPro was looking for the NAS it saw it as a new NAS was present and not properly configured. The on-screen instruction started by telling me to install the discs in the right order … assisting med to make a new admin account different form the default … and voila I was inn 
Hope you can use some of my experience.
Cheers