I upgraded ubuntu to 12.10, and the internet does not work on vbox
Solution 1
From Ubuntu 12.04 dns name resolve changed so that you should add "dns-nameservers" parameter to your /etc/network/interfaces file, like :
dns-nameservers 8.8.8.8 8.8.4.4
Solution 2
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
than:
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
Solution 3
As per thread here http://ubuntuforums.org/showthread.php?t=2049230
sudo apt-get install dnsmasq
solved the issue for me
Solution 4
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 8.8.8.8 8.8.4.4 as DNS servers or recofigure Virtualbox to provide DNS proxy service
VBoxManage modifyvm "VM name" --natdnsproxy1 on
or
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
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user100607
Updated on September 18, 2022Comments
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user100607 over 1 year
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?
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user100607 over 11 yearsI tried this, but with 4.2 my Vbox lost the ability to load OSX. This may be because my hardware is mac, but my host OS is ubuntu. Thanks for trying, though. On the plus side, while it was in 4.2, Windows seemed to run better.
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user100607 over 11 yearsThanks! Once I got the adapter back to "Intel PRO/1000 T Server (82543GC) and Vbox back to 4.1, this worked like a charm!
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Dan Jones over 11 yearsI had this same problem, and this fixed it perfectly for me. In fact, it also fixed another problem I was having with Windows 3.11 displaying stretched when I increased the resolution.
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functionptr over 11 yearsThank you so much! This worked perfectly for me on Xubuntu 12.10.