CNB BDS4812 (discontinued) - Manual (Page 48)

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BDx-Series Installation
5.3 Router Setup
If your DVR system network condition is using private IP in a Local network and you connect the
DVR out of the local network, you have to setup Port forwarding or DMZ of each of the IP sharer
or router.
DVR use port numbers as below.
Required port numbers for port forwarding
Function TCP/UDP Port
WEB TCP 80
Connecting TCP 7074
Audio TCP 7075
Video TCP 7076
Media TCP 7077
Audio1 UDP 49557
Audio2 UDP 49559
Alive UDP 49560
For detail configuration setup, refer the configuration manual for each router or IP sharer.