I am not sure if this is the proper forum but I'd appreciate any help/assistance/ideas... We have two networks totally isolated from each other (physically and with different subnets), one internal network only and one that connects to the internet only (with firewall of course). Usually those that are authorized to access the internet have two machines for each network, internal domain and internet. Now, with virtualization technology, we're thinking of reducing costs by setting up only one computer with two NICs. One for the internal network and one for a virtual machine that connects to the internet. How can I make the second NIC (the one for the quest OS) invisible/inaccessible to the host OS?