Great Circle Associates Firewalls
(November 1995)
 

Indexed By Date: [Previous] [Next] Indexed By Thread: [Previous] [Next]

Subject: Re: Restricting URL's
From: Carl Jolley <cjolley @ iac . net>
Date: Fri, 10 Nov 1995 09:44:35 -0500 (EST)
To: Don Lewis <gdonl @ gv . ssi1 . com>
Cc: Mike Culver <mculver @ ncelec . com>, firewalls @ GreatCircle . COM
In-reply-to: <199511090009 . QAA07714 @ salsa . gv . ssi1 . com>



On Wed, 8 Nov 1995, Don Lewis wrote:

> On Nov 8,  3:06pm, Mike Culver wrote:
> } Subject: Restricting URL's
> }  Think I hit on such a simple way to restrict URL's that we all looked right
> } past it! Yes, I see all the "buts" associated with this approach, but after
> } all it's free, simple, and will trip up the average attempt.
> } 
> } I'm assuming that most users use DNS with name resolution, instead of IP
> } addresses.
> 
> security through obscurity
> 
> } To deny resolution to sex.com, simply add an entry to named.boot for
> } bogusns. This directive will tell your DNS that the name server for sex.com
> } is bogus, and your DNS will never ask sex.com's DNS anything.
> 
> This won't work so well if the name server in question is ns.uu.net or
> some other server that serves a lot of zones that you probably still
> want to access.
> 
> 			---  Truck
> 

You are correct based on your "if". Wouldn't this approach work if the
site in question had an internal DNS server with forwarding to an
external server (so-called split DNS) for any unresolved names? The
internal name server would resolve internal names as necessary and
"handle" any external names that were to be restricted.






**** cjolley @
 iac .
 net <Carl Jolley>
**** All opinions are my own and not necessarily those of my employer ****



References:
Indexed By Date Previous: Re: FW: Firewall Software
From: Alan Dowd <dowd @ sctc . com>
Next: Re: Restricting URLs
From: Carl Jolley <cjolley @ iac . net>
Indexed By Thread Previous: Re: Restricting URL's
From: gdonl @ gv . ssi1 . com (Don Lewis)
Next: Re: Restricting URL's
From: ralph @ omni . mpsisys . com (Ralph Mitchell)

Google
 
Search Internet Search www.greatcircle.com