Question regarding Remote Access of devices behind the router (RUT241)

[AndreB]

Hello,

I know that you can access the router and it’s settings and also devices behind the router via http/sftp via the Teltonika RMS Remote Access (it’s working perfectly).

Is it somehow possible to use the created sftp access outside of the RMS system so that I can, e.g., connect to the ftp server via the RMS system?

Normally I would use the created port forward and the IP of the router directly but for some reason I did not get behind yet, I can’t manage to find a way to access it either directly or via an VPN connection. It’s a Telekom 4G SIM card and I need to be able to achieve a sftp connection to the device behind the router while the Teltonika RMS apparantly has absolutely no problem to access the router via the SIM?

Greetings.

[speibl]

Most likely your RUT is located after another device, doing NAT. Then it needs a “relay” server, having public IP. (Also valid, in case of using wwan on the RUT because of CG-NAT.)
The RUT connects its VPN to the “relay”, and then you can connect to RUT or its downstream devices via VPN, i.g. wireguard, using PC< mobile phone etc.
I do this on a large fleet of RUT955; running widely customized “official” openwrt, though.
However, should be possible to do this on RutOS, too, I suspect.