RUTX11 – the device is translating all LAN traffic to the address allocated to the 4G network. This address is random so we can’t set up routing back to it from the network as it will change on every reboot.
What we want to happen is that the traffic from the LAN is transported and pops out at the other end with the same IP address is started with. That way the 4G addresses can change but the LAN traffic won’t. Then we can set up return paths.