[Dnsmasq-discuss] Do "proxy-DHCP" without PXE

[Steven Maddox]

Ah and I just realised the final sentence I used in my original post 
said 'what' and not 'why' ... it meant to say...

" But I have a feeling I'm going to be told that "proxy-DHCP" is, and 
can only be, a PXE specific thing?  if so, **why** is that? "

Steven Maddox
Lantizia

On 29/04/2025 06:55, Steven Maddox wrote:
> Hi Simon,
>
> I didn't know about that, I'll take a look at it.
>
> But I have a feeling that it's not what I'm after, as the scenario I'm 
> talking about doesn't involve any PXE clients.  See the example 
> scenario I gave before where I referred to a Polycom phone.
>
> Steven Maddox
> Lantizia
>
> On 28/04/2025 19:52, Simon Kelley wrote:
>> The latest release, 2.91, includes a new option --dhcp-option-pxe, 
>> which may be of use here.
>>
>> Cheers,
>>
>> Simon.
>>
>>
>> On 28/04/2025 13:32, Steven Maddox wrote:
>>> Hello,
>>>
>>> Sorry if what I'm about to ask is impossible, but I just really 
>>> needed to know one way or another.
>>>
>>> I find dnsmasq such a handy utility for all kinds of situations (so 
>>> huge thanks for creating it!)... one such situation was back when I 
>>> was working with ThinStation and I'd do something like this to 
>>> quickly test how a new build would boot on some PXE enabled machines...
>>>
>>> dnsmasq -d -i enp2s0 -F192.168.1.0,proxy --enable-tftp --tftp- 
>>> root="$(pwd)/build/boot-images/pxe" -p0 --log-dhcp --pxe- 
>>> service=x86PC,'Network Boot',boot/lpxelinux/lpxelinux
>>>
>>> Ultimately it's the "proxy-DHCP" that I'm focussing on here.
>>>
>>> Would it be possible to use this technique to add extra arbitrary 
>>> DHCP options to a reply instead?  without touching the config of the 
>>> authoritative "other" DHCP server? e.g...
>>>
>>> dnsmasq -d -i enp2s0 -F192.168.1.0,proxy --enable-tftp --tftp- 
>>> root="$(pwd)" -p0 --log-dhcp -O 160,tftp://192.168.1.2
>>>
>>> This would be really handy in a scenario where you need to tell a 
>>> bunch of devices (e.g. Polycom phones) a new provisioning URL (in 
>>> that example option 160) on a temporary basis whilst you 
>>> reboot/factory-reset them. Especially when you're stuck using 
>>> whatever existing DHCP server is on the network with no ability (or 
>>> great difficulty) to reconfigure it.
>>>
>>> But I have a feeling I'm going to be told that "proxy-DHCP" is, and 
>>> can only be, a PXE specific thing?  if so, what is that?
>>>
>>> Thanks
>>>
>>
>>
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