qname minimization: me too :(

Michael Batchelder michael at isc.org
Fri Jun 21 07:03:14 UTC 2024


> Yes, sure. I grabbed three typical cases to analyze further, and
> currently trying to understand the proceedings - unsuccessfully, up
> to now. :(
>
> Case 1:
> -------
> Jun 19 17:42:12 <local0.info> conr named[24481]: lame-servers:
>        info: success resolving '26.191.165.185.in-addr.arpa/PTR'
>        after disabling qname minimization due to 'ncache nxdomain'
> 
> This one does not point back to me, but nevertheless I do not
> see the lame server.
> 
> Case 2:
> -------
> Jun 19 18:02:44 <local0.info> conr named[24481]: lame-servers:
>        info: success resolving 'reactivite.fr.intra.daemon.contact/AAAA'
>        after disabling qname minimization due to 'ncache nxdomain'
> 
> Here, for whatever reason, the client was not happy with the official
> answer on "reactivite.fr", and tried to append the search domain for
> internal hosts on my LAN.
> So this does absolutely point to me, only. The recursing LAN server
> asks the authoritative LAN server (same image, different view), and>
> that one basically says, this is bogus.
> 
> Case 3:
> -------
> Jun 19 18:28:48 <local0.info> conr named[24481]: lame-servers:
>        info: success resolving
>        '1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.1.0.0.3.2.f.1.0.7.4.0.1.0.0.2.ip6.arpa/PTR'
>        after disabling qname minimization due to 'ncache nxdomain'

Peter,

Case 1:

The 191.165.185.in-addr.arpa zone (@200.3.13.14) responds with NXDOMAIN to queries for any QTYPE for QNAME 191.165.185.in-addr.arpa.

Case 2:

The intra.daemon.contact zone (@195.154.230.217) responds with NXDOMAIN to queries for any QTYPE of QNAME intra.daemon.contact.

Case 3:

The f.1.0.7.4.0.1.0.0.2.ip6.arpa zone (@216.66.80.18) responds with NXDOMAIN to queries for any QTYPE for QNAME f.1.0.7.4.0.1.0.0.2.ip6.arpa

You'll need to fix these zones so that the response is NOERROR rather than NXDOMAIN.

b.


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