[Dnsmasq-discuss] Can I serve two different DHCP domains from a single dnsmasq server?

Alberto Cuesta-Canada alberto.cuesta at excelian.com
Thu Aug 12 16:14:54 BST 2010


Hi all,

 

I got to the reason for this not to work. My DHCP server is in a VLAN
that filters DHCP packs that would give IP addresses outside the defined
limits, there was nothing really wrong with the configuration.

 

Thanks,

 

Alberto Cuesta-Canada

GaaS Team Lead

Excelian Ltd.

[+44 | 0] 7942633361

 

________________________________

From: richardvoigt at gmail.com [mailto:richardvoigt at gmail.com] 
Sent: 05 August 2010 19:00
To: Alberto Cuesta-Canada
Cc: Santiago Zarate; dnsmasq-discuss at lists.thekelleys.org.uk
Subject: Re: [Dnsmasq-discuss] Can I serve two different DHCP domains
from a single dnsmasq server?

 

What version of dnsmasq are you using?

 

Your dhcp-host entries have their fields in all the wrong order.

 

Try

dhcp-host=02:00:0A:00:10:00,192.168.1.1,bar

 

Also, bar-range on the beginning of a dhcp-range line is incorrect.  It
should be tag:bar-range (in current versions of dnsmasq), but is not
actually necessary since the dhcp-host line controls the issued IP.

 

On Thu, Aug 5, 2010 at 11:15 AM, Alberto Cuesta-Canada
<alberto.cuesta at excelian.com> wrote:

Hi Santiago,

 

I've indeed tested it extensively before posting, at least as much as I
can without disturbing the production environments around.

 

With the configuration below, and ensuring that there were no leases
around to mess up anything, the machine in the bar domain would instead
get a random ip in the foo domain, no hostname, and foo dns domain.

 

On Sunday, when production is stopped, I can swap the order of the
domain lines to see if dnsmasq recognises only the first, and do other
more dangerous tests.

 

Regards,

 

Alberto Cuesta-Canada

GaaS Team Lead

Excelian Ltd.

+44 (0) 7942633361

 

________________________________

From: santiago.j.zarate at gmail.com on behalf of Santiago Zarate
Sent: Thu 05/08/2010 15:56
To: Alberto Cuesta-Canada
Cc: dnsmasq-discuss at lists.thekelleys.org.uk
Subject: Re: [Dnsmasq-discuss] Can I serve two different DHCP domains
from a single dnsmasq server?

if i'm not mistaken, this is possible... but its matter of begin
testing...



2010/8/5 Alberto Cuesta-Canada <alberto.cuesta at excelian.com>:
> Hi all,
>
> does anyone know if it is possible to send via DHCP hostnames in two
different domains from a single dnsmasq server?
>
> It should be something like:
>
> domain=foo,192.168.0.0/24
> domain=bar,192.168.1.0/24
>
> dhcp-range=foo-range,192.168.0.0,192.168.0.255,infinite
> dhcp-range=bar-range,192.168.1.0,192.168.1.255,infinite
>
> dhcp-host=02:00:0A:00:00:00,net:foo-range,host1,192.168.0.1,static
> dhcp-host=02:00:0A:00:10:00,net:bar-range,host2,192.168.1.1,static
>
> So what I would have is that host1 would get the fqdn host1.foo and
the 192.168.0.1 address, while host2 would be host2.bar and get the
192.168.1.1 address.
>
> Many thanks,
>
> Alberto Cuesta-Canada
> GaaS Team Lead
> Excelian Ltd.
> +44 (0) 7942633361
>
> ________________________________
>
> Date: Wed, 04 Aug 2010 20:02:07 -0700
> From: Paul Chambers <dnsmasq at lists.bod.org>
> Subject: [Dnsmasq-discuss] wildcard subdomains for a DHCP-assigned
>        host
> To: Dnsmasq List <dnsmasq-discuss at lists.thekelleys.org.uk>
> Message-ID: <4C5A29AF.9050802 at lists.bod.org>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
>  This may be a dumb question, but I'm no wiser after skimming the man
> page and experimenting a little...
>
> I have a development box I'm using to develop some virtual host stuff.
> I'd like to set up a wildcard subdomain for it. Essentially
> <anything>.dev.foo.bar would resolve to dev.foo.bar's IP address
> (assigned by DHCP). Its IP address does move on occasion, just often
> enough to be irritating/fragile to use an IP directly.
>
> For now, I've worked around it by adding
'address=/dev.foo.bar/<current
> IP addr>' to the config, but that's fragile and seems like a bad idea.
I
> could give the box a static IP I suppose, but I much prefer keeping
the
> number of static assignments to a minimum. Plus it's a laptop, so I'd
> keep it configured for DHCP and set up a static DHCP assignment based
on
> MAC address. Somehow none of this feels very satisfying, just
workarounds.
>
> Is there a better way I've missed? If not, is there a reason dnsmasq
> doesn't do this? would it be hard to add? (perhaps support wildcards
for
> cname?)
>
> -- Paul
>
>
>
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EC1Y 8RT
Tel: +44 (0) 20 7336 9595
Fax: +44 (0) 20 7336 9596
www.Excelian.com
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Any opinion or views contained in this email message are those of the sender, and do not represent those of the Company in any way and reliance should not be placed upon its contents. Unless otherwise stated, this email message is not intended to be contractually binding. Where an Agreement exists between our respective companies and there is conflict between the contents of this email message and the Agreement then the terms of that Agreement shall prevail.

Excelian
50 Featherstone Street
London
EC1Y 8RT
Tel: +44 (0) 20 7336 9595
Fax: +44 (0) 20 7336 9596
www.Excelian.com
_____________________________________________________________________
This e-mail has been scanned for viruses by MessageLabs. For further information visit http://www.messagelabs.com

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