DNS forwarding: does it actually work?
Joseph S D Yao
jsdy at center.osis.gov
Thu Mar 18 23:24:48 UTC 2004
On Thu, Mar 18, 2004 at 03:16:31PM -0800, Robert Abbate wrote:
> I appreciate all the help received on this issue.
> Before I try to setup a slave again, can anyone tell
> me what this is for, and if anyone actually uses it in
> their config?:
>
> options {
> ....
> forward first;
> forwarders {
> 12.34.56.78;
> };
> };
> ....
> }
>
> From what I can tell, it is supposed to forward
> queries to that IP first before looking them up
> directly...but I may be totally off.
I told you in my first message, and you are somewhat off.
For NON-LOCAL queries, it tries to forward to that IP / those IPs. If
it gets no response, THEN it uses the normal DNS distributed lookup
mechanism [which is not what I would have called "directly", but that
might have been what you were thinking]. However, if a forward gets it
a NEGATIVE response ["I know about that zone, and there is no such
value in it"], it stops and does not do the normal DNS distributed
lookup.
--
Joe Yao jsdy at center.osis.gov - Joseph S. D. Yao
OSIS Center Systems Support EMT-B
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