Re: Resolver issue

From: Kevin D. Goodknecht Sr. [MVP] (admin_at_nospam.WFTX.US)
Date: 07/16/04 

Date: Thu, 15 Jul 2004 19:21:43 -0500

In news:cd71vg$2ks0$1@newsreader2.mclink.it,
Massimo <barone@mclink.it> posted a question
Then Kevin replied below:
> "Kevin D. Goodknecht Sr. [MVP]" <admin@nospam.WFTX.US> ha
> scritto nel messaggio
> news:eRnQh6qaEHA.716@TK2MSFTNGP11.phx.gbl
>
>> This is the kind of answer you get when you query
>> non-recursive DNS servers, instead of getting an answer
>> you get a referral to the Root DNS servers.
>
> So, you're saying this kind of answer is good. Ok.

I wouldn't say it is a good answer, it is just the answer you get from a
non-recursive DNS server, you'll only get a referral to the TLD servers for
the TLD your query is for.

>
>> When I tried to query this DNS server, it timed out on
>> everything including libero.it which, it is
>> Authoritative for. So, I can tell you if ns1.libero.it
>> is able to do recursive queries.
>
> Interesting. I tried running a couple of network monitor
> traces on my DNS server, and it looks like Libero's DNSs
> time out when my DNS queries them at the end of the
> recursive query. But then, when querying them using
> NSLOOKUP, they answer!
> What's going wrong here?!?

I was finally able to make a query to this DNS, it is non recursive. What
that means is if it does not have the zone for the domain your querying for
you'll get a referral.
See this

flags: qr aa rd; QUERY: 1, ANSWER: 9, AUTHORITY: 0, ADDITIONAL: 17

see the rd? that is where I'm asking for recursion, if recursion was
available it would be followed by an ra like this one:
flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 0, ADDITIONAL: 17 

-- 
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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