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Date:      Thu, 17 Apr 2003 05:06:20 +1000 (EST)
From:      =?iso-8859-1?q?Sue=20Blake?= <aunty_sue@yahoo.com.au>
To:        freebsd-questions@freebsd.org
Subject:   root server dns queries
Message-ID:  <20030416190620.83303.qmail@web14002.mail.yahoo.com>

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I'm seeing a flurry of queries like those below every time I try
to send an email destined for the outside of an internal network.

Upon the send command, mutt pauses for 1-5 minutes and there is
no maillog activity, as if DNS lookup is stalling. Eventually the
mail gets out successfully.

I cannot access the internal DNS servers, which are running NT.
My BIND is cache only, forwarding to the NT boxes. Sendmail has
been configured to WorkAroundBrokenAAAA. The box is running
STABLE from about the end of February. When I query each NT
box directly with nslookup they give the appropriate responses
without fuss.

Since something seems to be querying each root server in turn
repeatedly (and failing), I whittled down my root file to
two root servers and restarted named as an experiment.
It still queried every one of them, not just the two it knew about.

I see the following almost constantly:

621.091795 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA J.ROOT-SERVERS.NET
621.092003 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 I.ROOT-SERVERS.NET
621.092194 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA I.ROOT-SERVERS.NET
621.092383 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 H.ROOT-SERVERS.NET
621.092575 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA H.ROOT-SERVERS.NET
621.092764 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 G.ROOT-SERVERS.NET
621.092954 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA G.ROOT-SERVERS.NET
621.093144 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 F.ROOT-SERVERS.NET
621.093332 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA F.ROOT-SERVERS.NET
621.093519 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 E.ROOT-SERVERS.NET
621.093708 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA E.ROOT-SERVERS.NET
621.093895 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA D.ROOT-SERVERS.NET
621.094087 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 D.ROOT-SERVERS.NET
621.094274 bsdbox.internal.net -> dns.internal.net DNS Standard query A6 C.ROOT-SERVERS.NET
621.094460 bsdbox.internal.net -> dns.internal.net DNS Standard query AAAA C.ROOT-SERVERS.NET
[...]
635.608491 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.608596 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.608696 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.608798 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.608901 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.609001 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.609102 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.609204 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.609305 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
635.609406 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
643.609064 dns.internal.net -> bsdbox.internal.net DNS Standard query response, Server failure
[...]

The high numbered port used at my end is, according to lsof,
owned by named and its number does not change until named is
restarted.

Have I goofed somewhere, or do I need some more NT kludges?

(Aplogies for the formatting, this is the only email available.)



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