Cannot Enable Push notification on mobile. ( DDNS server registration failed )

normel

Getting the hang of it
Joined
Dec 1, 2014
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Somehow, i am no more able to enable push notifications on my mobile for alarm trigger, because of the DDNS server registration failed,, thats the error message it shows me for about 2 or 3 seconds.
I have not set any ddns account, neither i want to. I dont need that. All ports are configured and open. Live view is ok.
What could be the cause?

BTW, i have used the alarm of the camera, which is connected to the NVR by poe port.
 
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