Re: [weirds] I-D Action: draft-hollenbeck-dnrd-ap-query-00.txt

[Dave Piscitello <[e-mail]>]

+1

In a searchable world, sometimes all you have is the IP of the name server that's resolving the malicious/harmful domain. So asking "what other domains host zone files at this IP?", "who registered those domains?", and "what registrar is sponsoring the registrations?" are all useful crumbs that often help you identify names used by in a campaign, or the registrant names used in association with a criminal enterprise. 

On Apr 30, 2012, at 10:46 PM, John Levine wrote:

>> I find the notion of asking a domain registrar for information about an
>> IP address to be confusing.  Is the user expecting to know who they
>> should contact about that IP address, are they expecting to find all the
>> possible mappings of labels to that IP address , or are they expecting
>> to have the domain query service perform a reverse lookup for them? 
> 
> For a name registry or registrar, I'd be thrilled to get a list of
> name servers they know about that resolve to that IP.  A common bad
> guy trick is to register a bunch of names, stick them all on the same
> servers, but use a different subdomain name for each one, e.g. foo.biz
> has name server ns1.foo.biz and bar.biz has ns1.bar.biz , but they're
> really the same IP.
> 
> R's,
> John
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