This article will show you how to enable/disable UPnP via Reolink NVR with a monitor connected.
Applies to: RLN8-410 (hardware version H3MB18/N2MB02/N3MB01/N7MB01), RLN16-410 (hardware version H3MB18/N6MB01), RLN36, NVS36 and RLN12W, NVS12W.
Please click Settings > Network > Advanced > UPnP enable or disable.