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Date:      Mon,  7 Dec 1998 14:04:38 -0600 (CST)
From:      Tony Kimball <alk@pobox.com>
To:        net@FreeBSD.ORG
Subject:   Re: resolver behaviour
Message-ID:  <13932.13268.182705.435207@avalon.east>
References:  <alk@pobox.com> <199812071141.DAA08796@salsa.gv.tsc.tdk.com>

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Quoth Don Lewis on Mon, 7 December:
: } I'm talking about bad nameservers on the Internet at large.
: 
: But the name server entries in /etc/resolv.conf point to your local
: name servers.  

They point to *some* name servers.  They may or may not be local,
depending on what you mean by local and the details of your configuration.

: If you send a query to one of your local name servers
: for broken-dns.com, and that name server tells you that broken-dns.com
: doesn't exist, it does not good to send this query to the rest of
: your local servers, since they'll just send a similar set of queries
: out to the Internet, get similar responses, and finally tell you that
: broken-dns.com doesn't exist.

This is the theory of dns, but in practice this is not the case.
NXDOMAIN replies are issued in cases where a valid mapping exists, and
can be obtained from another name server.  Repeating this fact is
now wearisome.

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