Vivotek MD9584-HF3 5MP Outdoor Network Mobile Dome Camera with Night Vision, Heater & 3.6mm Lens - Manual (Page 27)

VIVOTEK
User's Manual - 27
For example, your router and IP settings may look like this:
Device IP Address: internal port IP Address: External Port (Mapped
port on the router)
Public IP of router 122.146.57.120
LAN IP of router 192.168.2.1
Camera 1 192.168.2.10:80 122.146.57.120:8000
Camera 2 192.168.2.11:80 122.146.57.120:8001
... ... ...
Configure the router, virtual server or firewall, so that the router can forward any data com -
ing into a preconfigured port number to a network camera on the private network, and
allow data from the camera to be transmitted to the outside of the network over the same
path.
From Forward to
122.146.57.120:8000 192.168.2.10:80
122.146.57.120:8001 192.168.2.11:80
... ...
When properly configured, you can access a camera behind the router using the HTTP
request as follows: http://122.146.57.120:8000
If you change the port numbers on the Network configuration page, please open the ports
accordingly on your router. For example, you can open a management session with your
router to configure access through the router to the camera within your local network.
Please consult your network administrator for router configuration if you have troubles with
the configuration.
For more information with network configuration options (such as that of streaming ports),
please refer to Configuration > Network Settings. VIVOTEK also provides the automatic
port forwarding feature as an NAT traversal function with the precondition that your router
must support the UPnP port forwarding feature.