I am starting this topic to cover with known issues with certain routers. Not often but there are a few routers that you actually cannot do port forwarding or send out unwanted network traffic that can crash a DVR or IP camera like this router Motorola 3347. A customer had IP camera that kept crashing. After sniffing the network the router was doing a multicast that kept crashing the camera.
So this list so far
Motorola 3347 (multicast from router crashes IP cams)
message me or post in this topic and I will update the list.