[isapros] Re: TMG - Separate Forest?

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
  • To: <isapros@xxxxxxxxxxxxx>
  • Date: Mon, 12 May 2008 11:47:59 -0500

True, but that's why you need to choose good customers. They hired you
to shore up issues with documentation and provide clarification.

Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- Microsoft Firewalls (ISA)


> -----Original Message-----
> From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf
> Of Amy Babinchak
> Sent: Monday, May 12, 2008 11:45 AM
> To: isapros@xxxxxxxxxxxxx
> Subject: [isapros] Re: TMG - Separate Forest?
> 
> Yes, but the words are there and that's really all it takes for the
> uninformed masses. They have something to point to. Again.
> 
> thanks,
> 
> Amy Babinchak
> 
> 
> Harbor Computer Services |(248) 850-8616
> 
> Tech Blog http://securesmb.harborcomputerservices.net
> Client Blog http://smalltechnotes.blogspot.com
> Website http://www.harborcomputerservices.net
> 
> 
> -----Original Message-----
> From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx]
> On Behalf Of Thomas W Shinder
> Sent: Monday, May 12, 2008 12:02 PM
> To: isapros@xxxxxxxxxxxxx
> Subject: [isapros] Re: TMG - Separate Forest?
> 
> The documentation offers suggestions, and points out limitation. So,
> those suggestions aren't considered by thoughtful security admins as
> commandments. If Active Directory security best practices are used,
the
> chance of compromise is minute, and as I've demonstrated numerous
times,
> compromise of the ISA firewall will be the least of your problems :)
> 
> Thomas W Shinder, M.D.
> Site: www.isaserver.org
> Blog: http://blogs.isaserver.org/shinder/
> Book: http://tinyurl.com/3xqb7
> MVP -- Microsoft Firewalls (ISA)
> 
> 
> > -----Original Message-----
> > From: isapros-bounce@xxxxxxxxxxxxx
> [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf
> > Of Amy Babinchak
> > Sent: Monday, May 12, 2008 10:12 AM
> > To: isapros@xxxxxxxxxxxxx
> > Subject: [isapros] Re: TMG - Separate Forest?
> >
> > As long as the official documentation says otherwise, you're tilting
> at
> > windmills. If we know better and MSIT knows better, then why doesn't
> the
> > documentation get fixed? DOD won't buy if it says otherwise?
> >
> > thanks,
> >
> > Amy Babinchak
> >
> >
> > Harbor Computer Services |(248) 850-8616
> >
> > Tech Blog http://securesmb.harborcomputerservices.net
> > Client Blog http://smalltechnotes.blogspot.com
> > Website http://www.harborcomputerservices.net
> >
> >
> > -----Original Message-----
> > From: isapros-bounce@xxxxxxxxxxxxx
> [mailto:isapros-bounce@xxxxxxxxxxxxx]
> > On Behalf Of Thomas W Shinder
> > Sent: Monday, May 12, 2008 10:30 AM
> > To: isapros@xxxxxxxxxxxxx
> > Subject: [isapros] Re: TMG - Separate Forest?
> >
> > Exactly. The guidance as is applies to people who wear hard hats
when
> > they go outside out of fear that a falling piece from a passing
> airplane
> > will hit them on their heads. :)
> >
> > MSIT does it right, and I follow MSIT's model in my deployments. Why
> > lose Kerberos Constrained Delegation and other security features out
> of
> > fear of Comet strikes in the Gulf of Mexico? :))
> >
> > Thomas W Shinder, M.D.
> > Site: www.isaserver.org
> > Blog: http://blogs.isaserver.org/shinder/
> > Book: http://tinyurl.com/3xqb7
> > MVP -- Microsoft Firewalls (ISA)
> >
> >
> > > -----Original Message-----
> > > From: isapros-bounce@xxxxxxxxxxxxx
> > [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf
> > > Of Jim Harrison
> > > Sent: Monday, May 12, 2008 8:21 AM
> > > To: isapros@xxxxxxxxxxxxx
> > > Subject: [isapros] Re: TMG - Separate Forest?
> > >
> > > Actually, that "old-school approach" does limit the threat of
> exposure
> > for your internal
> > > forest.  It's not about "if ISA gets compromised" as much as "if
an
> > account is
> > > compromised".
> > > If you have the skill and means to build that and can tolerate the
> > limits it imposes (no
> > > KCD from the edge), then this is a good recommendation.
> > > What isn't stated is that this can be one part of a layered ISA
> > deployment.
> > > FWIW, MSIT deploys ISA / TNG at the edge in the same forest as the
> > user accounts.
> > >
> > > Jim
> > >
> > > -----Original Message-----
> > > From: isapros-bounce@xxxxxxxxxxxxx
> > [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf
> > > Of Jason Jones
> > > Sent: Monday, May 12, 2008 1:13 AM
> > > To: isapros@xxxxxxxxxxxxx
> > > Subject: [isapros] TMG - Separate Forest?
> > >
> > > Just noticed this in the current TMG documentation...disappointed
> this
> > old school
> > > approach is still recommended :-(
> > >
> > > "At the edge, you can install Forefront TMG as a domain member or
in
> > workgroup
> > > mode. As a domain member, we recommend that you install Forefront
> TMG
> > in a
> > > separate forest (rather than in the internal forest of your
> corporate
> > network), with a
> > > one-way trust to the corporate forest. This may help the internal
> > forest from being
> > > compromised, even if an attack is mounted on the forest of the
> > Forefront TMG
> > > computer. There are some limitations with this deployment. For
> > example, you can
> > > configure client certificate authentication only for users defined
> in
> > the Forefront TMG
> > > domain, and not for users in the corporate internal domain or
> forest."
> > >
> > > You guys spent much time looking at TMG yet?
> > >
> > > JJ
> > >
> > >
> > >
> > >
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