I’m trying to figure out a connection through VPN which grants access to a LAN network, this network has a RUT951 with a SIM card which grants access to remote devices via APN.
So far I manage to gain access to the RUT951 through VPN. But I still struggling to reach any remote device via APN though the RUT951. Also, I can reach those devices if I’m connected on the LAN network.
I guess that there is still some configuration needed on the RUT951 to make a “passage” through it from the VPN access. Maybe create a route or something.
I did create a route to get access to the RUT951 from the VPN:
To better assist you, could you please clarify a few points about your setup:
What is the LAN IP address of the RUT951 and the end device you’re trying to reach behind it?
From your topology draft, it looks like the RUT951 gets a private IP from the APN, could you confirm whether this is a bridge/passthrough mode or a standard NAT routing setup?
Additionally, which VPN protocol are you currently using?
It would be very helpful if you could redraw or describe the topology more clearly, including all relevant IP addresses on each device and how they’re connected: VPN server, client, LAN network, and end LAN-side devices.
Lastly, I’d strongly recommend updating your RUT951 firmware to the latest available release (7.15.2), as the current running firmware version is pretty outdated.
In the meantime, you might find these knowledge base articles useful regarding LAN-to-LAN communication over VPN:
We are already using ZeroTier for other purposes. But seems we already have the “architecture” to do this connection, so we are trying to achieve it with our existing VPN and avoid any confusion with ZeroTier network.
