I have a Vivotek ND9541 with 6 cameras connected over the LAN and one I would like to connect from a different geographical location over the internet. Both locations have internet connection with 50Mbps down and 10Mbps up. My question is on the side where the WAN camera is installed which ports must I forward at the router to the camera in question? Presently I’ve forwarded 80 with limited success. Limited meaning the camera will display a brief live feed within the NVR for a few moments but then goes away. The image will refresh at times but not a steady live feed. Both internet connections have static IP's.
For still image viewing you need only http port but for live video you need to forward additional ports - follow documentation - I found :
Which port will be forwarded by router after enabling UPnP port
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