named.conf restored to hint zone for the root by default

Doug Barton dougb at
Thu Aug 2 13:49:44 PDT 2007

Oliver Fromme wrote:
> Hi,
> Just for the record, I like the current solution, i.e. default
> being a "hint" zone, and slave zones being commented out, ready to
> be used for those who know what they're doing.


> However, I noticed that the "refresh" interval of the root zone is
> 1800, i.e. it would be fetched every 30 minutes,

No, refresh is how often the master servers are checked for serial
number changes. It's only fetched when the serial is updated.

> even though the zone seems to be updated at most once per day.

The serial is updated twice a day whether there are content changes to
the zone or not. Whether this is a good practice or not is an open

In the odd chance that a change is introduced which is found to be
"bad" for some reason, the zone can be updated more frequently than
twice a day. This hasn't happened very often, but it has happened.

This is why what's suggested below is not a good idea either.



Eygene Ryabinkin wrote:
> Doug, good day.
> Thu, Aug 02, 2007 at 03:14:38AM -0700, Doug Barton wrote:
>> Matthew Dillon wrote:
>>> It has always seemed to me that actually downloading a physical
>>> root zone file once a week is the most reliable
>>> solution.
>> This is a really bad idea. The root zone changes slowly, but it
>> often changes more than once a week. Add to that the more-rapid
>> deployment of new TLDs nowadays and the occasional complete
>> reprovisioning of an existing TLD, and one week is too long to go
>> between updates.
> But if one will pull the root zone via FTP/HTTP at the zone's 
> refresh rate or so -- will it be still a bad idea, compared to the
> AXFR method?


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