Forward zone problem: Forward query vs Direct query from the receiving DNS servers perspective.
Barry Margolin
barmar at alum.mit.edu
Sun Mar 26 05:29:08 UTC 2006
In article <e04rk6$2oen$1 at sf1.isc.org>,
"Stefanick, Andrew" <astefanick at metasolv.com> wrote:
> This looks to be working to the conclusion that the target server is
> providing the wrong answer to my query.
You should be able to confirm that by getting a packet capture of DNS
traffic between your server and the forwarder.
>
> Here is my last question though?
>
> Is there a difference between a forwarded request to a DNS server vs a
> direct query?
A forwarded request will have the Recursion Desired flag set. A direct
query from a caching server will not. A direct query using the dig
command will have the flag set unless you specify the +norecurse option.
> Is there a case where the DNS server will ignore a forwarded request,
> yet answer the direct query?
If the server is authoritative for the zone in question, I don't think
it should matter. But if it needs to recurse further, the Recursion
Desired flag will be significant.
>
> Or is a query just a query. No difference?
--
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
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