Not every server can resolve same name / cache issue?

[Barry Margolin]

In article <9k72kr$8n4 at pub3.rc.vix.com>,
Lawrence Mackley  <larryslists at yahoo.com> wrote:
>
>Recently (past two weeks) we have experienced strange
>behavior with NT 4.0 SP5 and Solaris 8 DNS servers.
>One example is the internal DNS server used by users
>can resolve all names but one, such as www.isc.org. If
>I try to resolve that name from another DNS server it
>is resolved just fine. When I compare the caches of
>the two servers both have the domain but only one has
>the A record. This is also occurring with MX records.

Most likely, something is poisoning the NS record caches.  Check the cache
to see what they have for the NS records for isc.org and org.

A few weeks ago I was helping a customer and they had bad NS records for
COM cached, because of some web hosting site that had configured their
nameserver as authoritative for COM, ORG, and NET.  Recent versions of BIND
won't cache these bogus NS records, but he's running an old version without
the checks (I had him reconfigure his server to use ours via "forwarders").

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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