On Wed, 2023-09-27 at 06:48 +0000, Tris wrote:
>
> ------- Original Message -------
> On Wednesday, September 27th, 2023 at 8:42 AM, Florian Obser
> <flor...@openbsd.org> wrote:
>
>
> > On 2023-09-27 01:01 +02, Joel Carnat j...@carnat.net wrote:
> >
> > > Hi,
> > >
> > > Because of Apple Private Address feature, my static IP
> > > allocations based
> > > on MAC address (hardware ethernet) doesn't work anymore. Looking
> > > at
> > > dhcpd.leases, some devices provide a client-hostname value ; but
> > > not
> > > every one.
> > >
> > > Is there a dhcpd.conf configuration parameter that forces DHCP
> > > clients
> > > to send a client-hostname information in their DHCP request?
> >
> >
> > My understanding of the dhcp protocol is that this can't work. The
> > client sends a bunch of things and requests a bunch of stuff. The
> > server
> > can honour that request or decline it. But it can't say: I'd give
> > you a
> > lease if you'd give me a hostname.
> >
> > The server can decline to give a lease without a hostname in the
> > request, but then the client would be left guessing why it didn't
> > get a
> > lease.
> >
> > > And if so, can this information be used by dhcpd(8) to apply a
> > > fixed-address to those device?
> > >
> > > Thank you,
> > > Joel C.
> >
> >
> > --
> > In my defence, I have been left unsupervised.
>
> From what I see on my network with the private address feature, is
> that it uses the same MAC address on the same WiFi network. It only
> uses a different one per network.
>
> My Apple devices "seem" to get the same IP address on the home
> network.
>
So what you actually want is this:
1.) if client submits hostname, provide with IP address regardless of
its MAC address
2.) if you didn't serve the client in step 1, look at the client's
MAC address and see, whether you have something in store
3.) host is not served yet, hand out address from pool.
