Ticket #13628 (closed enhancement: fixed)

Opened 3 years ago

Last modified 22 months ago

iPXE ROM missing HTTP feature

Reported by: linuxgod Owned by:
Priority: major Component: other
Version: VirtualBox 4.3.18 Keywords: PXE
Cc: Guest type: all
Host type: other


The iPXE ROM that is used in recent versions of VirtualBox has a limited feature set. Whereas we use iPXE with HTTP to build thousands of servers, the built-in iPXE ROM lacks this feature. Therefore when booting a VM, iPXE fails with "Could not start download: Operation not supported (".

While there is a workaround of installing the VirtualBox Extensions Pack and then using the Intel PXE ROM instead of iPXE, this problem could be easily resolved by enabling the HTTP feature in the iPXE ROM.

Change History

comment:1 Changed 3 years ago by klaus

Note that the available ROM space is very tight, which is why we had to disable pretty much all convenience features going beyond the bare minimum required by the PXE spec.

comment:2 Changed 3 years ago by frank

  • Status changed from new to closed
  • Resolution set to fixed

Nevertheless we enabled this config option in VBox 4.3.20.

comment:3 Changed 3 years ago by socratis

That has got to be the fastest fix in VBox's history. 24 hours from filing to resolved and made it in the 4.3.20 in another hour! Wow! ;)

comment:4 Changed 3 years ago by kemad

FYI: the HTTP feature is disabled again in VBox 4.3.24.

comment:5 Changed 3 years ago by frank

kemad, weird. We didn't change anything in this regards. Which host are you using and which package did you install (exact package name please)?

comment:6 Changed 23 months ago by MyDogHasFleas

  • Status changed from closed to reopened
  • Resolution fixed deleted

Running VirtualBox 5.0.12r104815, removed the Extension Pack. Originally dowloaded from

When I do a PXE boot, I see on the VM window:

IPXE 1.0.0.+ - Open Source Boot Firmware -- Features: DNS TFTP PXE PXEXT Menu

as you can see, no HTTP feature.

Please re-enable this config option for IPXE Boot ROM! thanks.

comment:7 Changed 23 months ago by MyDogHasFleas

Forgot to mention, if it matters, I'm running on OS X 10.11.3.

Just upgraded to latest 5.0.14r105127 and same issue.

comment:8 Changed 23 months ago by frank

Confirmed. This change was not intended. The latest test builds have the HTTP code re-enabled in iPXE.

comment:9 Changed 23 months ago by MyDogHasFleas

I installed the test build and indeed the HTTP feature is now enabled in iPXE, thanks.

However, still cannot boot Linux (specifically CoreOS Linux) because the bzimage feature is needed to support the CoreOS cpio.gz file.

Is it possible, please, to also enable the bzimage feature in your iPXE? Thanks.

here's my iPXE script if it matters:

kernel /assets/coreos/current/coreos_production_pxe.vmlinuz coreos.autologin coreos.config.url= coreos.first_boot=1
initrd /assets/coreos/current/coreos_production_pxe_image.cpio.gz

comment:10 Changed 22 months ago by frank

  • Status changed from reopened to closed
  • Resolution set to fixed

Fix is part of VBox 5.0.16.

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