Re: Internal/External DNS

Ace,
Thanks for the reply. I understand the internal servers should not respond
with the external address, but the Sophos people inisist they must be doing
this when the problem happens. It has only happened twice in about a month,
by the way. Before I can reply to them, I need to eliminate the possibility
of some kind of glitch or bug that might cause the query for a name in the
local zone to be forwarded under some conditions. The only option I see is to
get an expert opinon to the effect that no such thing exists - period.

To answer your questions, the external DNS server's IP is not listed under
the Nameservers tab under the zone's properties on the internal DNS servers -
only the internal servers themselves are shown there. The Forwarder is not it
a Conditional Forwarder. Only 'All other DNS domains' is visible under "DNS
domain".

Thanks again.


"Ace Fekay [MVP]" wrote:


DNS will NOT forward queries for zones it hosts. DNS will answer for any
zones it hosts, and if there is no match for a host query under the zone, it
simply returns a NULL and will NOT forward on.

Is the external DNS server's IP listed under the Nameservers tab under the
zone's properties on the internal DNS servers?

How did you configure the Forwarder? Is it a Conditional Forwarder or to
'All Other Domains?'

.

Relevant Pages

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