@Babun-Sikder My first thought about your problem is that perhaps your firewall is blocking RTSP. If I understand your problem correctly, you are saying that when viewing live camera streams locally...

@Tibor74 You can but not by connecting the wi-fi cameras directly to the NVR. I dont believe the VIGI NVR1104H-4P has wi-fi capability built-in however you should be able to use wi-fi cameras with it...