http://stackoverflow.com/questions/175876/how-do-i-fix-my-vms-network-connection-if-it-seems-to-be-running-ok-from-the-ho 0 down vote I also had this sort of problem. But In my case, Ubuntu 11.10 was on VirtualBox on Windows 7 Enterprise, and tightly secured corporate network. But the issue, I think, was on host side. What I did, is as follows: 1. On VirtualBox's Network setting, choose "NAT", and check "Cable connected" 2. On host machine's network adapter settings, re-check that "VirtualBox Host-Only Network" has DHCP, all other settings are set to automatic. 3. On host machine's own "Local Area Connection", went to "Properties""Sharing" , and check "Allow other network users ...". And "OK" 4. On virtual machine, Disconnect once by "Uncheck"ing "Enable Networking", then "check" again. Bingo!, then Internet was working fine.