Hello
I am facing the same issue with the latest FW on TRB140 (FW : TRB1_R_00.07.01).
The setup is an openvpn server (linux based) and teltonika clients.
The client config is a file, TLS auth is used.
The config is OK with RUT240 & RUTX12, LAN config of RUTs are in the same subnet, works.
With the TRB140, I need to leave the original config (DHCP for instance), setup the VPN, add the tap0 to the exiting bridge and make an alias on the bridged interface (to access the subnet).
by the way, I do not have the tap0 proposed in the administration UI to perform the bridge with the UI.
Do you have any information on the resolution of this issue?
Thank you
M.