[NTLUG:Discuss] OT - nslookup question

[Greg Edwards]

fredjame wrote:
> Greg Edwards wrote:
> 
>>
>> Simply means that the answer came from a name server that knows the 
>> answer, but is not the name server that manages the domain asked about.
>>
> I hope this isn't a silly question, but ... What is the possibility that 
> the "name server that knows the answer, but is not the name server that 
> manages the domain asked about" may be wrong?  Thank you in advance for 
> any help you may be able to offer.
> Regards
> Fred James
> 

Short answer is yes it can be wrong.  You really don't want the loooong 
answer ;)

There are factors that can cause a Non-authoritative server to return a 
wrong answer.  For example, when a name server is being updated at the 
source and a mistake is made it can happen.  But in practice it doesn't 
happen that much when the authoritative server is stable.  That is, unless 
it's being done on purpose in a hijacking attempt.  Server admins can 
reduce the exposure of bad addresses by using a fairly short TTL value, 
among other things.

HTH
-- 
Greg Edwards

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