The open source phone software Asterisk has a unique problem when you are trying to set it up instide inside a VE. If you buy licenses for the G729 codec from [http://www.digium.com Digium] and run the registration program it will fail. That's because the registration process requires that it has access to the MAC address on eth0 in order to work. But there is a way around it. You can make the eth0 device appear within the VE as follows: