Physically isolated GW + 3g dongle

Default debian buster allows to get internet from such dongle after installing extra packages (libjim77, usb_modeswitch, usb_modeswitch-data), no further actions are required. I have installed extra packages to an isolated Whonix 15 GW, but had no success with getting internet up. What are the necessary steps to make it work? The dongle itself acts as an external ethernet interface recognized by GW as eth1 and it also has DCHP onboard.


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grep Whonix source code for


Dev/git - Kicksecure

Or can somehow the dongle be renamed to eth0?