stub zones

[Nex6|Bill]

I guess, i am having issues with this(maybe i am not fully getting it), and yea I know large environments sometimes have multiple sets of name servers. sometimes department level (i have this issue in my shop its a damn mess)

if all the zones are delegated properly the local resolver will query its NS, and that NS will know where it should go next, whether its a internet side query or navigating the mess of local NS servers that some folks have. in the case of DNS views, where the local resolver may NOT be able to get to the correct view a forwarder would be better so you can point to the internal view NS. This keeps NS servers that are authoritative and responsible for handing out resource records
they hand them out. and unless, your dealing with a load balancer (which is its own exception) which needs short TTLs, a caching forwarder is far better in most cases.. 


I guess, I am still not sure of the point of a stub zone, where you point to a different NS? than the authoritative NS for that zone? unless your changing the records 

which is all bad....

  


On Monday, June 2, 2014 2:18 PM, John Miller <johnmill at brandeis.edu> wrote:
 

>
>
>Not quite, Bill.  You point the zone at a different name server, but 
>_your_own_nameserver_ still does the iterative queries to make things 
>happen.  It just queries a different set of nameservers than would 
>happen through normal delegation.
>
>The only recursive query going on is from the client to your nameserver.
>
>Since you asked the question, what would you propose as an alternative 
>for folks running multiple sets of nameservers with different info on them?
>
>John
>
>
>On 06/02/2014 04:52 PM, Nex6|Bill wrote:
>> so, stub zones allow you to point a zone to a different name server, and
>> that name-server; to recurse to get the records for that zone. why? why
>> not let DNS work the way it is suppose to and let your name servers work
>> for you to the authoritative name-server to get the records? unless,
>> your changing the zone records, which is why most people I know use it
>> for, which is evil :)
>>
>> its almost the same, as creating a local zone for something your not
>> authoritative for and then having to maintain those records. but, i
>> guess their may be cases where it may be useful....  i guess....
>>
>>
>> On Monday, June 2, 2014 1:33 PM, John Miller <johnmill at brandeis.edu> wrote:
>>
>>
>>
>>     Evil?  Seems a bit strong.  Unusual?  Use with caution?  OK.
>>
>>     Stub zones mean that you're using a different set of authoritative
>>     nameservers for a particular domain.  You're not storing all of that
>>     domain's records, except through the usual caching process.  If it's
>>     a domain you control, where's the harm?
>>
>>     Also, let's say that you're nominally a caching-only nameserver.
>>     You're responsible for making iterative queries, and you do not want
>>     the RD bit set.  AFAIK, stub zones are the way to accomplish that.
>>     Forward zones just pass recursive queries on to someplace else.
>>
>>     John
>>
>>
>>
>>
>>     On Mon, Jun 2, 2014 at 4:02 PM, Nex6|Bill <n6ghost at yahoo.com
>>     <mailto:n6ghost at yahoo.com>> wrote:
>>
>>         recently, a question came up about "stub" zones came up and what
>>         they are and are they part of the DNS standards or are they a
>>         good idea. i said, they are evil and should not be used if you
>>         can avoid it.  they way I understand them is the are when you
>>         create local zones for zones you are NOT authoritative for. and;
>>         the records in the stub zone do not update when the
>>         authoritative NS does.
>>
>>         correct? thoughts?
>>
>>         -Nex6
>>
>>
>>
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>>
>>
>>     --
>>     John Miller
>>     Systems Engineer
>>     Brandeis University
>>    johnmill at brandeis.edu <mailto:johnmill at brandeis.edu>
>
>>
>>
>
>
>
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