Great Circle Associates Firewalls
(September 1994)
 

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Subject: Re: Usefulness of Split DNS?
From: ericw @ fx . com (Eric Wedaa)
Date: Thu, 1 Sep 94 13:23:16 PDT
To: firewalls @ GreatCircle . COM, rali @ mailgate . hri . com

 > 
> What is, indeed, the usefulness of hiding "inside" names via a split
> DNS?
> 
> I can see that it might hinder a "bad guy" if there was *no* way to
> determine the inside net ID, but in a majority of cases the inside net is
> known ...
 
Says who?  My inside networks are not known outside the company.  In fact, my
inside networks aren't even registered.  Hiding them means that we can
create/destroy random class C networks at will.  Our firewall and router
don't advertise those routes, so no other site is going to get burnt by 
our random Class C networks.  And as long as we don't have to connect to 
any of the sites that have those addresses, we're ok.  (So far, so good.)




>>>>>Ericw


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