Re: Recursive DNS setup

Sorry, if I seem dense, but it sounds like I did get everything backwards...

Let me see if I've got this straight: In general, recursion in DNS means to
use external sources?

If I enable recursion on the forwarder page, then the DNS server will use
the root servers if it doesn't get resolution from the forwarding server?

And if I disable recursion on the forwarder page, then the DNS server will
NOT use the root servers if it doesn't get resolution from the forwarding
server?

Thanks!

"Kevin D. Goodknecht Sr. [MVP]" <admin@xxxxxxxxxxxxxx> wrote in message
news:uvWV6yr4GHA.2264@xxxxxxxxxxxxxxxxxxxxxxx
Jerry Mickman wrote:
Hi All,

I just want to make sure that I've either got this concept right, or
completely wrong.

If I configure a DNS forwarder on a Server2003 DC using an external
DNS server for "all other domains," am I correct that if I don't
disable recursive on that entry, if the server can't resolve the
address, my DNS server will not query the root servers to try to
resolve the DNS info?

A better way to ask this... If I enable recursive queries, am I
correct in thinking that if the server can't resolve the address, it
will just "throw up its hands and give up?" That if I disable the
recursive queries, it will try to resolve using the root servers?

It all depends on if your talking about "Disable Recursion" on the
Advanced
tab, or checking "Do not use recursion.." on the Forwarders tab.
"Disable recursion" stops all external queries.
"Do not use recusion..." only tells your DNS server to NOT use its root
hints, meaning, if it doesn't have the zone, wait for the answer from the
forwarder which could take several seconds, and fail the query if the
Forwarder can't get the answer.

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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