When enabling DDNS and it says cant connect to server.
1. Ensure DVR connected to internet
2. Ensure DNS 1 = 168.95.1.1
3. DNS 2 = 8.8.8.8
4. Disable DDNS then enable
5. Go check event log and make sure it says DDNS OK .
Once all that is fine then you can add to eagleeyes app.