Re: Reverse DNS

From: Darren Dunham (ddunham@redwood.taos.com)
Date: 04/04/03 

From: Darren Dunham <ddunham@redwood.taos.com>
Date: Fri, 04 Apr 2003 00:01:29 GMT

Barry Margolin <barry.margolin@level3.com> wrote:
> In article <3E8CAD27.8020004@asas.com>, Raphael <raf@asas.com> wrote:
>>So there is no real practical way of finding out what FQDN's on the
>>public DNS servers that point to my IP address?

What's a 'public' DNS server? Does it make any difference if the
server is inside a company firewall and not visible to the internet?

> No. It's like trying to find all the symlinks that point to a file. The
> only way is an exhaustive search.

It's potentially even worse. At least all files on a filesystem can be
reached by looking for children of root '/'. Since nameservers can
restrict xfers, you can't even do an exhaustive DNS search.

Mind you, I'm wondering why the OP is asking. While this is potentially
a very difficult exercise, I don't think of random DNS servers linking
to other IP addresses as being a big problem.

Raphael, can you tell us more why you're asking about this? 

-- 
Darren Dunham                                           ddunham@taos.com
Unix System Administrator                    Taos - The SysAdmin Company
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

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