Re: [sitefinder-tech-discuss] Pseudo code please

[David Blacka <davidb@verisignlabs.com>]

On Wednesday 22 October 2003 01:10 pm, Kee Hinckley wrote:

> Given a hostname provided by a user (e.g. foo.example.com), how do I 
> determine that the result I get back when I lookup the A record 
> corresponds to something provided by example.com rather than 
> something generated by Verisign?

I think that you are now asking a totally different question.  However, 
this question has a good answer.

You can generally tell what zone an answer is coming from by looking at the 
AUTHORITY second of the DNS response.  You should generally see either a 
NS RRset (for "positive" responses) or an SOA (for "negative" responses).  
The name of the NS RRset or the SOA is the name of the zone that the 
answer is coming from.

-- 
David Blacka    <davidb@verisignlabs.com> 
Sr. Engineer    Verisign Applied Research


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