Hi, this is passthrough mode with a SIM card and fixed IP.
We’ve set the device up on a SonicWall firewall with a single interface, pulling a DHCP IP from the Teltonika which should correspond to the fixed IP of the SIM card.
The address doesn’t always pass through to the SonicWall, even if I manually try and renew. Sometimes it does, but the gateway doesn’t appear to function for us and we have no connectivity out.
Even in plain router mode with a desktop PC attached, connectivity is unreliable and sometimes works, sometimes doesn’t. It seems as though if I change the Mobile WAN to be the primary, it stops functioning properly and is buggy - but I need to do this to activate passthrough mode.