Re: AD in the DMZ . . . OK?
From: Pierre A. Cadieux (hobbit_at_theshire.com)
Date: 07/29/04
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Date: Thu, 29 Jul 2004 08:28:53 -0700 To: karl <opium@runningriver.co.uk>, security-basics@securityfocus.com
One of the first things to consider with this type of architecture is what
is at risk. Depending on how you have it implemented the AD can contain a
ton of information that should be properly protected. Is placing this
repository in your DMZ a "good idea"?
Not being sure what industry you are in or what your possible privacy
exposures are, If this is only used for authentication, and the information
is simply userID/Password, this may be ok. Be very certain to harden the
system properly, no userID's used in the DMZ should match internal ID's and
enforce an aggressive password rotation schedule, and monitor the heck out
of the network and systems in your DMZ.
In some ways having an AD in the DMZ makes sense, but it can be a huge
risk. Figure out if the risk is required, and if you have done everything
you need to prevent any additional exposure.
->Pierre Cadieux, CISSP
At 03:49 AM 7/28/2004, karl wrote:
>Hello
>
>One of the developers I work with has come up with a wild and crazy notion
>to write a .NET app that sits on a DMZ Web server but gets user
>information from the Active Directory on the other side of the firewall..
>
>I'm inexperienced with this, so did some research and found that this kind
>of thing is possible (plenty of articles on putting Exchange servers in
>the DMZ), but found myself wondering if this ever happens, i.e. do people
>actually have their networks set up this way? Do folk expose/replicate AD
>to the DMZ in practice?
>
>It's all very well that this stuff is possible, but if it's perceived as
>insecure and not implementable in the real world . . . . . . .
>
>Thanks for any advice . . . . .
>
>Karl
>
>
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Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off
any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
pen testing experience in our state of the art hacking lab. Master the skills
of an Ethical Hacker to better assess the security of your organization.
Visit us at:
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