Forwarding request to another DNS server but the same domain

[Jeronimo L. Cabral]

In office #1, the "company.com" master zone is updated automatically from
some Windows machines inn DNS1 and in office #2 the same zone is updated
manually in DNS2 by the administrator who shouldn't update (using freeze
and unfreeze) the master zone from office #1. This is the scenario, and we
need that a simple query to DNS1 be responded with any record from both
zones.

Thanks again


On Wed, Apr 30, 2014 at 5:54 PM, Kevin Darcy <kcd at chrysler.com> wrote:

>  Oh, I thought this was an external-versus-internal scenario. But, this
> is even easier.
>
> A) One of the nameservers (pick DNS1 or DNS2) becomes a slave (of the
> "stealth" variety, if you want) of the other
> B) People use nsupdate to maintain the zone
>
> For security, TSIG-sign the updates. For fast change propagation, set up
> NOTIFY if and as necessary.
>
>
>                                                         - Kevin
>
>
> On 4/30/2014 4:32 PM, Jeronimo L. Cabral wrote:
>
> Dear John, this is my scenario:
>
>  1) Office 1: people work with some machines and fill up a local master
> zone "company.com" with records in DNS1
> 2) Office 2: people works with some others machines and fill up a local
> master zone "company.com" with another records in DNS2
>
>  So both office have a different master zone.
>
>  Both offices belong to the same company, so I need that any client PC
> can resolve a hostname from "company.com" domain, independently if this
> record is in DNS1 or DNS2.
>
>  Thanks again, regards.
>
>  JeLo
>
>
>
> On Wed, Apr 30, 2014 at 5:21 PM, John Miller <johnmill at brandeis.edu>wrote:
>
>>  Hi Jeronimo,
>>
>>  First of all, please just tell us the real domain.  Yes, we could try
>> and talk about a fictitious "example.com" or "company.com," but having
>> the real domain name lets us actually query your nameservers.
>>
>>  Let me be sure I understand: you have two DNS servers.  Each of them is
>> authoritative for the same domain.  Are both set as master?
>>
>>  The two servers have different copies of the zone--what's your reason
>> for that?
>>
>>  If both servers think they are authoritative for a zone, then they will
>> answer recursive queries for those zones themselves.  From the manual:
>>
>> "Forwarding occurs only on those queries for which the server is not
>> authoritative and does not have the answer in its cache."
>>
>>  What exactly are you trying to achieve?
>>
>>  John
>>
>>
>>
>>  On Wed, Apr 30, 2014 at 3:55 PM, Jeronimo L. Cabral <
>> jelocabral at gmail.com> wrote:
>>
>>>  Dear, I would like to ask for solution related with DNS (bind)
>>> configuration to allow forward requests to another DNS but related with
>>> the same domain.
>>>
>>> I'm asking about two authoritative name servers serving the same domain
>>> but with different zone file info on each and have one of them forward
>>> recursive queries to another one if first one cannot find some particular
>>> subdomain record that is missing in his version of zone file.
>>>
>>>  My named.conf.local is as follow, but it doesn't work:
>>>
>>>  zone "company.com" {
>>>     type master;
>>>     file "/etc/bind/zones/company.com.db";
>>>     allow-transfer { key "company"; };
>>>     check-names ignore;
>>>     forward first;
>>>     forwarders { 172.16.1.1; };
>>> };
>>>
>>>  Thanks a lot,
>>>
>>>  JeLo
>>>
>>>
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>>
>>
>>
>> --
>> John Miller
>> Systems Engineer
>> Brandeis University
>> johnmill at brandeis.edu
>> (781) 736-4619
>>
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>
>
>
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