I am trying to configure a serial gateway on TRB142 device. I have a SIM card with a fixed IP inserted in the device and I can PING the device on this address and access it using the SSH.
I have configured the Serial Utilities - Over IP as a Server and I have defined the server TCP port. The server is accessible through the LAN network, but it is not accessible through the WAN network (fixed IP SIM card).
Is there something I am missing out or is there something else that needs to be configured to get the access to the Over IP server from the WAN network?