http://askubuntu.com – I have a Windows7 guest running in a VirtualBox hosted by Precise (Ubuntu 12.04 LTS). In the settings of the virtual machine I have activated the 'Remote Display' (Enable Server) with default settings (server port, authentication method). The network of the guest is attached to NAT. I try to use Remmina to connect from the host to the guest. (HowTos)