Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a Linux laptop running a PXE server. I run the PXE server on the wired port so I can connect computers to it directly. When the Ethernet port is connected I can use PXE to boot a VirtualBox machine using a bridged network. (Bridged to wired of course.)

When there is a cable connected to the Ethernet port, everything works just fine. But I'd like to be able to test the PXE server when I reconfigure it without connecting something to the Ethernet port.

When the virtual machine tries to get an IP address I see that there is a DHCP discover received and a DHCP offer is send, but the DHCP request and acknowledge never occur. As I said before, it works flawless when a cable is connected.

I have considered using a loopback connector, but I'm not sure that this will work and don't see this as a real solution. Maybe something like a TUN/TAP interface will do the trick?

share|improve this question

Use host-only network interface vboxnet0 (or create new one), but remember to disable its DHCP service.

virtualbox host-only nic

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.