Adding PXE boot options to a Network

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Kenneth Roberts

• June 14, 2021 15:22
• Edited

I just wanted to share my experience with getting a Use Case up and running in my Home Lab environment. In the past I have used FOG for deploying Images to VM's and Computers on my networks. This required me to either add additional options on the DHCP server, Options 66 and 67, or deploy a DNSMasq server with FOG do layer those options on top of the regular DHCP server. On the surface, Firewalla does not allow that, yet.

I opened a support ticket and they were able to lead me down the right path to update the DHCP scopes on the back-end. Creating a pxe.conf file in ~/.router/config/dhcp/conf/ allows you to add custom options onto your desired scope.

The format is:

dhcp-boot=tag:[target interface],[DHCP Option number],[DHCP Option Value]

So it would come out like:

dhcp-option=tag:br0,67,undionly.kpxe

dhcp-option-force=tag:br0,66,"192.168.100.20"

 

One snag I hit that seems to be a bug (but might be intentional?) with the DNSMasq itself, Option 66 is not sent to clients. I had to find another option by digging through documentation and forums. This ultimately provided part 2 of my use case.

Format:

dhcp-boot=tag:[Target Interface],[PXE Boot File],[File Source Type],[Target File Server]

Example:

dhcp-boot=tag:br0,undionly.kpxe,tftp,192.168.100.20

 

Maybe not a lot of users here will need this, but wanted to share this for the few that do, and thanks a heap to support for getting me to the proper file location.

6

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  Sher

  • October 18, 2021 21:06

  Thank you for writing this.Just ordered my Firewalla Gold and this is the first thing i am going to do, Do you have any blog or something on your setup? 

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  Andre Liersch

  • November 12, 2021 08:07

  Thanks for pointing me to the correct folder. I was using Pihole as my primary DHCP server before. I was able to use the exact same TFTP config on the FWG covering both Legacy and EFI boot now.

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  Robert Davidson

  • August 25, 2023 14:51
  • Edited

  Sorry to nerco this thread, but I am also struggling to get my FWG setup with option 66 and 67. I can add the options from the mobile interface, but they just don't work. If I add the exact same options to a different DHCP server the client's boot no problem. How do I fix this?

  

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