Win11: No connection via IP

[gambacherkalbenstein]

Hello everyone!

I am am not so sure if this is the right subforum to post this question, but it sounds somehow good.

After upgrading to Win 11 Pro - yes, I did - I cannot connect to my NAS TS-453b-mini on QTS 5. Somehow the Win 11 installation routine killed some settings I cannot figure out.
I downgraded to Win 10 - still same issue. So I upgraded again to Win 11 LOL
Not possible via Firefox, Chrome or Edge. Nevertheless it works fine via remote ip via QNAP cloud.

Any ideas anyone?
And no, Win 11 reset is not an idea, it's a cheap excuse...

Thanks in advance to everyone willing to help!
Cheers!

[dolbyman]

did you upgrade to qts5 and win11 at the same time ?

If not, when did the connection fail?

I have win 11 on qts 4.5 and Win10 on QTS 5 ..not your mix (Win11 and QTS5)

[gambacherkalbenstein]

i roughly did. but it still works like a charme on my other win 10 machine. i even changed the hosts file - no success.

and i need to admit that i am a network noob...

tried to put a new rule into the windows firewall... no result...

edit: running the windows 11 problem solver (german "problembehandlung") rought up "is online, but does not react"

[gambacherkalbenstein]

Google Meetings do not work out due to "network issues" and get cancelled aswell

[dolbyman]

They have nothing to do with the NAS, so there might be deeper issues I guess

[gambacherkalbenstein]

I think so, too, but there's still no solution...