The router is MR3420 it’s set for WAN, only. That the DVR is connected by cable. If I enter random DNS, IP does appear to function? I never loss internet connection and all other devices function...

I have a DVR, with XMeye that functions for maybe an hour an then XMeye disconnects. In Net Settings I view "Probing DNS." This problem a result of incorrect router configuration? And what to do to...