[Dnsmasq-discuss] configure different "external" A records?

[Simon Kelley]

On 29/07/13 18:38, Florian Klink wrote:
>
>
> Am Montag, den 29.07.2013, 16:43 +0100 schrieb Simon Kelley:
>> On 24/07/13 13:01, Florian Klink wrote:
>>> Hi,
>>>
>>> I have a setup here with some virtual machines attached to br0 that get
>>> their ipv4 and ra-stateless/ra-names from dnsmasq.
>>>
>>> dnsmasq.conf:
>>>           resolv-file=/etc/resolv.conf.dnsmasq
>>>           interface=br0
>>>           interface=net0
>>>           no-dhcp-interface=net0
>>>           bind-interfaces
>>>           domain=vms.mydomain.com,172.16.0.0/16
>>>           dhcp-range=172.16.0.20,172.16.0.50
>>>           dhcp-range=2a01:xxxx:xxxx:xxxx::, ra-stateless, ra-names
>>>           dhcp-option=option6:dns-server,[::]
>>>           dhcp-option=option6:information-refresh-time,6h
>>>           enable-ra
>>>
>>> The nameserver for mydomain.com has a NS entry for vms.mydomain.com
>>> pointing to the external (net0) interface, so you can dig
>>> vm1.vms.mydomain.com AAAA and get the correct address.
>>>
>>> However, a problem is that I also get the A record to 172.16.0.x for
>>> this machine when digging from the outside.
>>>
>>>
>>> What I basically want to archive:
>>>    - AAAA records point to internal vm addresses (works)
>>>    - when digging from the outsidem, A records for all vms point to a
>>> globally reachable ipv4 addr (proxy that does the http requests for all
>>> ipv4-only visitors)
>>>    - when digging from the inside, A records still point to the
>>> 172.168.0.x adresses offered by dnsmasq dhcp
>>>
>>> Is it possible to get such a behaviour with dnsmasq?
>>> "localise-queries" is not what I want, right?
>>>
>>> Thanks for your help,
>>>
>>> Florian
>>>
>>>
>>
>> Check the latest dnsmasq release, and look in the man page for thr
>> AUTHORITATIVE CONFIGURATION section. That describes tools that may be
>> able to help.
>>
>>
>> Simon.
>>
>>
>
> Cool, I didn't knew that there is an authoritative mode :-)
>
> After removing
>
> interface=net0
> no-dhcp-interface=net0
>
> and adding
>
> auth-server=vms.mydomain.com,net0
> auth-zone=vms.mydomain.com,2a01:xxxx:xxxx:xxxx::/64
>
> dnsmasq answers to "AAAA" queries. "A" queries get NXDOMAIN.
>
> How can I now configure the "autoritative part" of dnsmasq to answer
> with a "static A record" for *.vms.mydomain.com?
>
> Something like address=/vm.mydomain.com/x.x.x.x doesn't seem to work...

address= lines don't work for the authoritative stuff. In fact there's 
no way to a widlcard - sorry.

If there was you'd need an auth-zone for the relevant IPv4 subnet, of 
course.

Maybe I should think about wildcards.

Simon.
>
> Florian
>
>
>>>
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>>
>>
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