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Date: Sun, 1 Jun 2003 17:56:24 -0700 (PDT)
From: Doug Barton <DougB@FreeBSD.org>
To: Blake Swensen <blake@pyramus.com>
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cc: FreeBSD ISP List <freebsd-isp@FreeBSD.ORG>
Subject: Re: OT: Due diligence
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On Wed, 28 May 2003, Blake Swensen wrote:

> I am working with an ISP who is considering purchasing another ISP. The
> seller claims that they are hosting a certain number of domain names. I
> was asked to verify this number for accuracy.

You haven't defined "hosting." Are you talking about whether or not the
ISP is serving dns for these domains, or www, or mail.... what exactly?

The other problem is that what you want to do is more or less impossible
without having the list of actual domains that they claim to host.

http://dougbarton.net/bind-users/FAQ.html#DelegationList

OTOH, if you have the list, you can recursively query for the information
that satisfies the definition of "hosting" that you come up with.

Hope this helps,

Doug

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