How can I access the device connected on the Teltonica device with ip address 10.249.85.47) on eth0 from switch 10.249.85.1 ?
What configuration is required ?
My guess is that I don’t need port forwarding since it will refer to 10.249.85.5 (wan ip).
What is already working: accessing the device on 10.249.85.5 ip, but not on 10.249.85.47.
Gateway is reachable (I did set a static route).
I don’t understand your topology. Can you explain what exactly you want to do? Are all the ip addresses correct in your screenshot?
Where is the device on network 10.248.85.0 coming from on network 10.249.85.0?
You may find it useful to read the article Setting up a WAN as a local network Setting up WAN as LAN - Teltonika Networks Wiki, as well as change IP lan to IP wan and disable DHCPv4 and DHCPv6 on the router.
Link to how to change the IP address of the local network: RUTX11 LAN - Teltonika Networks Wiki
Best regards,
Andrii.