How can I find out who is currently connected to the DVR?

Question

network hardware

Question: There is an esvi h.264 DVR, tell me, please, how can I find out the ip of the currently connected to the DVR?
There is port forwarding on the Asus network adapter, but I didn’t see what I need in it.
I can't say exactly which model.

Answer 1

What OS?
It's not clear what happened to the port.
Both in niks and in Windows there is a netstat command, with the appropriate keys, it will give you the information you are interested in.
In Windows, you can also look in the resource monitor, which is launched from the task manager.