OpenVPN access devices on local LAN
I have seen other questions regarding this issue, but none of the answers have helped me so far.
I have a simple setup where I am using the 4G router to function as an external access point for a building management device. The SIM is configured to have a static IP. I have configured the OpenVPN within the router as client access: Home Network only and I am able to connect to the VPN.
The problem arises that I have to access the building management device, which resides at 192.168.6.100, which only allows access from the same subnet. Since the VPN client by definition has a different subnet, I am not able to connect to the system. When connected directly to the router, this does function without problems.
Is there a workaround for this, by for example setting static routing options? The current routing options are only the default ones in the router
Thank you in advance.