I have a Hikvision 7108 SN/P and cannot seem to access it on the local LAN. I cannot ping it from a machine or access the web interface. However it reports that it is actually connected to the network and I can even use the app to access the cameras. I can access the web interface using the external DDNS address or external IP address. I have tried forwarding ports and turning them off and all are the same. I am using a Netgear AC1900 router with the cameras connected to the NVR and the NVR connected to a powerline adapter to my router. I cannot work out whats wrong.