I set this up succesffully using the network-manager-gnome gui to share the wifi to the ethernet (with DCHP) and it seems to work well on my Pi - I can connect and access the WAN when I have a Wifi connection,but will get an assigned IP even if I dont has an active wifi connection on the Pi. That means I can VNC in and join a Wifi network - all good.
However when I send an SD card image to someone as part of a workflow I have created with the Pi, they cannot connect through the ethernet as I do - the DCHP sharing connection part does not allocate an address to the connected device. I suspect the network-manager-gnome ethernet sharing is tied to the specific mac address of the ethernet device and not just eth0. Any idea how to make this portable? I need the recipient of the image to have it just work when they plug it in, as they will have little to no linux experience.
I have verified that all the hardware is working their end.