You have 4xDS-2CD2342WD cameras wired to a Netgear PoE switch, they have IP addresses of 192.168.1.65, 66 and more. Correct.
You have a 7608N-E2/8P which is wired to an Asus router. To a switch port? Correct.
The cameras and the NVR can all be seen by SADP, and they show IP addresses in the...