On Jul 26, 2011, at 10:51 PM, Feng He wrote:
> On Wed, Jul 27, 2011 at 8:51 AM, Chris Buxton <chris.p.bux...@gmail.com>
> wrote:
>>
>> On Jul 25, 2011, at 10:33 PM, Feng He wrote:
>>
>>> On Tue, Jul 26, 2011 at 3:55 AM, ju wusuo <juwu...@yahoo.com> wrote:
>>>> Would like to use the BIND stub zone function, however, heard that ISC
>>>> considers stopping support to stub zone in the future, is that true?
>>>> _______________________________________________
>>>
>>> Hi,
>>>
>>> what's the use of stub zone? I never used it, thanks.
>>
>> A stub zone is conceptually similar to the root hints zone, but for a domain
>> other than the root. It's a way to add NS and glue records to the cache as a
>> way to either optimize recursion performance or overlay a private namespace
>> onto the public Internet.
>>
>> For example, suppose you have a name server with this configuration:
>>
>> options {
>> <some stuff goes here>
>> };
>>
>> zone "bluecatnetworks.com" {
>> type stub;
>> masters { 192.168.0.1; };
>> };
>>
>
> Thanks.
>
> So, what's the difference between a stub zone and a slave zone?
> I think the configure:
>
> zone "bluecatnetworks.com" {
> type slave;
> masters { 192.168.0.1; };
> };
>
> Will be able to have the same effect.
Mostly, yes. The difference is that with the slave zone, the server is
authoritative. This may have undesirable side effects:
- You must consider either using a low refresh timer or configuring DNS notify
on the master.
- It may cause problems for DNSSEC-aware clients that hit the server.
- It takes more memory and possibly more bandwidth. For a single zone, probably
not a problem, but suppose there are 10000 or more zones involved.
Chris Buxton
BlueCat Networks
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