Suboptimal behavior from nsd
ted at tednet.nl
Mon Jan 12 14:12:56 UTC 2004
[Quoting Stephane Bortzmeyer, on Jan 12, 14:55, in "Re: Suboptimal behav ..."]
> On Thu, Jan 08, 2004 at 02:36:51PM +0100,
> Ted Lindgreen <ted at tednet.nl> wrote
> a message of 49 lines which said:
> > An authoritative-only server should only produce the necessary
> > glue: info about in-zone nameservers, and no other Additional
> > data.
> So, BIND is wrong?
No, BIND is (per default) not an "authoritative-only server".
BIND is (also) a caching forwarder, and caching forwarders can/may
give back any RRsets it has properly looked up and successfully
cached earlier, when it believes such RRsets may to be relevant to
the requestor (like an A RR to which a CNAME or an MX points).
What a caching forwarder server should NOT do, is to construct
answers using RRsets received as glue on earlier queries. But I
don't think modern BINDs (i.e. later than BIND4) are doing that
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