Last week, I upgraded my operating system to Ubuntu 12.10 from 12.04, and the internet stopped working on two virtual machines (launched with virtualbox), Windows XP and OSX Snow Leopard. OSX also stopped working completely at first, but I fixed that by switching to the 64 bit option in the vbox settings. I switching to bridged networking from NAT restored the internet to Windows, but not to OSX. Does anybody know what I could be doing wrong?
I had exectly same issue. You need to upgrade the VirtualBox to 4.2.X (that helped me)
Add one of the following lines according to your distribution to your /etc/apt/sources.list:
deb http://download.virtualbox.org/virtualbox/debian precise contrib
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add - sudo apt-get update sudo apt-get install virtualbox-4.2
More about installation and post install steps you can read here: https://www.virtualbox.org/wiki/Linux_Downloads
As per thread here http://ubuntuforums.org/showthread.php?t=2049230
sudo apt-get install dnsmasq
solved the issue for me
First check how is network configured in guests if its DHCP then probably they don't get DNS servers from host as after update Virualbox has no runing DNS service for nated guests thus they can't resolve hostnames.
There are two solutions 1) Setup guest mashines to use 184.108.40.206 220.127.116.11 as DNS servers or recofigure Virtualbox to provide DNS proxy service
VBoxManage modifyvm "VM name" --natdnsproxy1 on
VBoxManage modifyvm "VM name" --natdnshostresolver1 on
Changing DNS server config in guests works for me the other solution might work (acording to VBox documentation) havent tested it myself
I was having the same problem. Using 12.10 as a host and running Windows Vista as a guest. The following solved the problem:
VBoxManage modifyvm global --natdnshostresolver1 on
Personally, none of the above solutions worked out in my case.
However, the following command, found here, made my day:
vboxmanage modifyvm "Your VM Name" --natdnshostresolver1 on
Hope that helps,