Hello,
Could you please clarify if your RUT acts as an OpenVPN server or client?
Firstly, navigate to Network → Firewall → Edit OpenVPN zone, and ensure that forwarding to and from LAN is allowed.
Secondly, if the RUT is acting as a server, you will need to add a push option in your OpenVPN configurations. Specifically, you will need to push a route to RUTs LAN network to your OpenVPN client. For example:
route 192.168.1.0 255.255.255.0
If your RUT is acting as a client, you will need to add a route to your RUT device on your OpenVPN server. If this is a case, please take a look at these forum posts here and here.
Kind Regards,