Whitelist MAC addresses for PXE boot.

https://maas.io/docs/about-maas-networks#heading--about-pxe-booting
https://maas.io/docs/how-to-set-up-networks
https://maas.io/docs/how-to-connect-maas-networks
Notice their is a dropdown box for UI/CLI and Snap or Packages by version numbers.
https://maas.io/docs

The docs don't mention anyway to whitelist MAC addresses, unless am missing it?

https://maas.io/docs/about-dhcp#heading--about-dora
Look at the network diagram.
https://discourse.maas.io/t/maas-networks/6680#heading--About-MAAS-DHCP-snippets#heading--About-MAAS-DHCP-snippets

https://discourse.maas.io/
These are the MAAS professionals
They will need to know what version of maas - snap or package
Ubuntu 1 login

I don't think I explained my question correctly.

We have DHCP up and running and can PXE boot servers, we want to be able to control which servers are allowed to PXE boot.

There's multiple servers on the same network, they can not be on separate VLANs / separate networks. We don't want a random server rebooting and picking up the PXE boot.

I'll try the discord link you posted if this can't be answered here.

Thanks,

My opinion on that matter is that this has to be prevented either by the DHCP server (not granting an IP address to a foreign server) or by the server that delivers the boot files.

Have you looked at DHCP configuration options, maybe this helps:
https://manpages.ubuntu.com/manpages/focal/en/man5/dhcpd.conf.5.html#allow%20and%20deny%20within%20pool%20declarations

"Once deployed, there are a couple of minor state changes you can effect without releasing the machine:

    You can lock a machine, if desired, to provide a little extra insurance that it won’t accidentally be changed by you – or anyone."
https://maas.io/docs/about-machines

   " If you add a machine manually, MAAS will automatically commission it. There are also ways to turn off this automatic commissioning, should you desire to do so."
Configuring a computer to boot over PXE is done via its BIOS.
https://maas.io/docs/about-machines#heading--about-adding-machines

Thanks Manfred, that could be an option to explore.