minimal-response, additional-from-...

[Mark Andrews]

> On Fri, Jul 06, 2007 at 04:39:19PM +1000, Mark Andrews wrote:
> 
> > [ dlc wrote: ]
> > > Which config, exactly, "breaks stub zones"?  
> 
> > 	The NS query response doesn't return additional data if
> > 	"minimal-response yes;" is set.  Stub zones require the
> > 	additional data (glue) to be sent.
> > 
> > 	A stub slave could work around this by querying for the
> > 	address records of nameservers that are at or below the
> > 	stub zone name using the addresses in the masters clause.
> 
> I wonder, then, why my config is working OK.  I just performed a 
> test with a new BIND-9.4 recursive server configured with stub zone 
> clauses pointing at my production servers; these are the production servers 
> with "minimal-response yes" set.  I captured a packet trace as the 
> test 9.4 server started up, and it seems to have behaved as you suggest 
> above: When the test server recived a minimal/no-glue response to it's SOA 
> query for the stub zone (17.172.in-addr.arpa, for example), it re-queried 
> the same master for NS records.  (Interestingly, the second query was 
> TCP.)
> 
> I then asked the test server for a name in a zone delegated elsewhere 
> (1.17.172.in-addr.arpa, delegated to another group), 
> and it followed the delegation and returned the correct reply.
> 
> The production servers are BIND-9.3.0.

	and none of the server for the zone live below the zone cut.
	Try doing the same with a forward zone where the servers live
	below the zone cut.
 
> > 	Alternatively priming query exception could be extended to
> > 	all NS queries not just those for the root.  The later would
> > 	be a case of removing the test for the root zone.
> > 
> > 2110.   [bug]           "minimal-response yes;" interacted badly with BIND 
> 8
> >                         priming queries. [RT #16491]
> 
> I suppose only BIND Forum members have access to this RT system?  How was thi
> s 
> bug resolved?
> 
> 
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org