OK I see the problem now.
The guest is going to see a normal wired network since the network adapter is emulated to the hosts network adapter.
Usually it just connects and works but you are being asked to add a layer of authentication that Is not normally used. Well not for Virtual Machines so much. At least I have not.
You might try to use the paravirtualized network adapter which should just use the hosts adapter direct. Other then that you would need to post a ticket to the DEVs and see what they say bugtracker
. You will need to setup an account there as it is on a different system.
It would also help if you can post the ticket number here so other can see the progress, add information, or see the final results.