On Mon, 20 Dec 2010 22:49:16 +0900 <hypnos75 at gmail.com> wrote: > 6) In the Linux host, bring down the other Internet connections (e.g., > WiFi) to avoid confusing apps. Copy the resolv.conf to /etc, and add > a default route using the VirtualBox network device ("vboxnet0") as > the gateway. Another thing to make sure here is that the VirtualBox network device in the Linux host (vboxnet0) is on the same subnet as the VirtualBox network device in the Windows side. The following steps should work: # ifconfig vboxnet0 192.168.0.2 netmask 255.255.255.0 # route add default gw 192.168.0.1 # cp /home/<you>/resolv.conf /etc/resolv.conf 192.168.0.1 is the address of the VirtualBox device in the guest. By default, my version of VirtualBox sets the IP address of vboxnet0 to 192.168.56.1, putting it on a different subnet.