QNAP Security VioStor NVR (Version: 4.1.1) - Manual (Page 243)

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Environment 2: The NVR and the IP camera are installed behind the router, while the
monitoring PC is located remotely
IP address Mapped port on the router
NVR 192.168.1.1 8000
Camera 1 192.168.1.101 8001
Camera 2 192.168.1.102 8002
Camera 3 192.168.1.103 8003
Router public IP 219.87.144.205
PC 10.8.10.100