Hardened tor middlebox design, "Tor Bridge Middlebox"

[HulaHoop]

@tubby-tor

Using a setup very similar to Whonix, a VM tor middlebox only has access to the internet using a USB device. Thus the middlebox retains exclusive access to the USB device and also has a compiled driver. The Host does not have the USB device driver nor anything else that would permit it to connect to the internet.

Whonix can be built for the RPi so it is a matter of rolling it up and doing custom setups you describe though it is unlikely we have the time or resources to maintain them unless there is a paid support request.