[Dnsmasq-discuss] How to disable bootp and all pxe boot in Dnsamsq?

[Simon Kelley]

Frank wrote:
> Hi experts:
>      In my subnet there is an bare metal provision system called 
> "linmin" which will serve pxe installation, I am also using dnsmasq in 
> same subnet as a programmable DHCP server.
>      now I want to disable all bootp and pxe stuff in dnsmasq because if 
> dnsmasq offers IP during pxe installation, the linmin system will not work.
>      I see from the man page simply ignores parameter will disable the 
> functionality, so I add "dhcp-boot" in /etc/dnsmasq.conf, unlucky the 
> dnsmasq cannot start error message:
> 
> Starting dnsmasq:
> dnsmasq: missing parameter at line 87 of /etc/dnsmasq.conf
> 
>      So what should I do to disable it? thank you.
> 

PXE boot ROMS make DHCP requests with the vendor-class set to a string
which starts with "PXEClient"  you can test for this with

dhcp-vendorclass=set:pxestuff,"PXEClient"

and then tell dnsmasq to ignore anything which matches with

dhcp-ignore=tag:pxestuff


That syntax assumes a reasonably up-to-date dnsmasq version. You can do
the same thing with older code but the syntax is different, so check
back here for a translation.

HTH

Simon.