[Dnsmasq-discuss] Some MAC addresses recognised, others not, in dhcp lines

[Geert Stappers]

On Sun, Aug 04, 2019 at 10:27:27AM +0100, Chris Green wrote:
> On Sat, Aug 03, 2019 at 11:36:25PM +0200, Geert Stappers wrote:
> > On Sat, Aug 03, 2019 at 09:50:44PM +0100, Chris Green wrote:
> > > I'm running dnsmasq version 2.76 on a raspberry pi to provide DNS and
> > > DHCP services on my LAN.
> > > 
> > > I have some dhcp-host lines in my configuration file to give names to
> > > systems that don't give their names, e.g.:-
> > > 
> > >     dhcp-host=00:09:B0:C9:CE:81,onkyoTx-nr616
> > >     dhcp-host=28:EF:01:2D:EB:07,chrisKindle
> > >     dhcp-host=08:EB:74:9D:47:53,humaxFreeview
> > >     dhcp-host=2C:08:8C:CC:9A:9E,humaxYouview
> > >     dhcp-host=00:1F:E2:4E:8F:CA,maxineStudy
> > >     dhcp-host=1C:1B:0D:60:9A:E1,ben
> > >     dhcp-host=AC:AE:19:2C:3F:5A,roku
> > >     dhcp-host=10:FE:ED:63:29:74,TL-WA7210
> > > 
> > > Most of these work but a couple don't work.... ..and I think I have
> > > just realised why they don't work.  Systems which don't request their
> > > IP address from dnsmasq don't provide dnsmasq with their MAC address
> > > and thus dnsmasq doesn't give them a name.
> > > 
> > > Presumably these static IPs must be put into /etc/hosts on the dnsmasq
> > > system, is this the only way of handling this?
> > 
> > To handle what?
> > 
> > Please elaborate the challenge you are facing.
> > 
> The 'challenge' of giving names to IPs which don't want to tell me
> their names! :-)
> 
> I want TL-WA7210 and 'ben' to be names I can use (and see).
> 

Yes, we all do want that magic happens.

dnsmasq is not magic, it is high tech software that does
several tasks, among them is "DNServer" and "DHCP server".

Be aware that DNS and DHCP are two separate protocols.

Both services do need configuration
and that does need some knowlegde.


Back to
> > > Presumably these static IPs must be put into /etc/hosts on the dnsmasq
> > > system, is this the only way of handling this?

As Andrew Miskell wrote
in http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2019q3/013177.html
| address=/hosta/192.168.1.1
| 
| Will map hosta to 192.168.1.1 for DNS lookups.


I would go for entries in /etc/hosts because that
doesn't require reloading of dnsmasq.


Groeten
Geert Stappers
-- 
Any sufficiently advanced technology
is indistinguishable from magic.  -- Arthur C. Clarke