VirtualBox guest has no network

Question

I have openSUSE 12.1 x64 host and I'm running Ubuntu 10.04 x86 as guest.

My problem is that Ubuntu sees no network at all. I have both tried NAT and bridge setup but I have no interface on the VM. ifconfig returns only lo

VirtualBox version is 4.1.18_OSE running as a member of vboxusr group and I installed the correct addins in the guest.

How can I fix this?

Solution

It appears that your guest only has a loopback interface for whatever reason.

Try entering the virtual machine settings and see if the VM has a network card installed.

If that is not the case. And you have recently changed the VM's mac address then I would look at this thread as the user seems to have the exact same problem as you.

https://forums.virtualbox.org/viewtopic.php?f=7&t=43090

specifically this "each time you give a new MAC address (in VBox guest settings) Debian and Ubuntu guests udev assigns a new eth number edit /etc/udev/rules.d/70-persistent-net.rules or delete the file: it will be recreated @ next boot"

Comments

[usr-local-ΕΨΗΕΛΩΝ]

I followed the advice and found that the .rules file has been recreated matching the virtual device's MAC address but still ifup eth0 says "ignoring unknown interface eth0"

[usr-local-ΕΨΗΕΛΩΝ]

I had to add "auto eth0 iface eth0 inet dhcp" to /etc/network/interfaces. Problem solved

[VBwhatnow]

Good, did you change the rules file by the way? or did you just notice it was correct?

[usr-local-ΕΨΗΕΛΩΝ]

It was recreated correctly with the proper mac address

[drodsou]

Worked for me also in Ubuntu 12.04 deleting that file: rm /etc/udev/rules.d/70-persistent-net.rules and then creating a wired conetion linked to the new mac in system settings/network/options