Forwarding request to another DNS server but the same domain

[John Miller]

First of all, unless you need separate views for each office, don't go down
that path.  Why are you attempting this as opposed to standard master-slave
replication?

There's something else I'm not understanding here: why would recursive
queries from one office go to the other office's nameservers?  What's
preventing you from setting up a second recursive nameserver in each office?

John



On Wed, Apr 30, 2014 at 4:32 PM, Jeronimo L. Cabral <jelocabral at gmail.com>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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>
>


-- 
John Miller
Systems Engineer
Brandeis University
johnmill at brandeis.edu
(781) 736-4619
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