I need to run an old version of Ubuntu Linux on my new server to support some otherwise obsolete software. It should have been easy but my ignorance made it take a few days of intermittent head banging. Here are few notes for my future self.

1. When importing virtual machines into VirtualBox they change the MAC address of the simulated Ethernet connection. In my case this resulted in a non-working network. The simple fix (in the Ubuntu Feisty guest) is to edit the /etc/iftab to replace the MAC address with the correct one.
2. Using the remote display requires installing the extension pack.
3. Tunnel the remote display with ssh -L3389:localhost:3389 host