@AntonisM 

AntonisM wrote

  @Clive_A Ok. I just re-enable full access to internet, so when the problem appears again I'll notify you.

That's not the point. You mentioned that this becomes inaccessible when you block domains. Theoretically, it should not affect that. 

I am telling you to connect the monitor to the NVR directly so you can diagnose from the NVR directly with the tools it provides. This would be much easier to learn about if there is a problem with your access to the NVR or the NVR itself.

  @Clive_A Take a look here:

You didn't read the messages.

The NVR becomes inaccessible when something is comming from the cloud.

That's the reason I stopped the connection to some FQDNs.

Take a look at the logs:

At 19:45:23 I saw the message that "Legal device notification issued by the cloud".

After that (the next second, at :24) the device goes offline.

I cannot connect after that message to the NVR.

I don't know if I can use the monitor, I don't care, as it's a Network Video Recording, I bought it for the Network capability.

I'm using NVRs/DVRs for the last 25 years, I'm working with computers for 40 years, I'm a network administrator for 26 years.

I may not be the best technician, but I can undestand what's happening and if the problem is on my side or not.

And yes, it's not on my side.

I'm not subscribed to any cloud services. You can see the screenshots on the previous messages.

I DON'T WANT "THE CLOUD" to make MY device offline.

It's a bug? Maybe. But not my problem.