[isapros] Re: ISA, Exchange 2007 and Perimeter Networks

From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
To: <isapros@xxxxxxxxxxxxx>
Date: Sun, 14 Jan 2007 16:33:20 -0600
No, I think it's absurd -- they're cow-towing to the Syphco rep trained
port-opener "network guys".
 
There is no additional security conferred IMHO.
 
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/> 
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7 <http://tinyurl.com/3xqb7> 
MVP -- Microsoft Firewalls (ISA)

 


________________________________

        From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Jones
        Sent: Sunday, January 14, 2007 4:07 PM
        To: isapros@xxxxxxxxxxxxx
        Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter Networks
        
        
        Jim/Tom,
         
        I noticed that quite a lot of the ISA firewall appliance vendor
promote the "ISA in a new forest, with a one way trust to the existing
forest" model. Do you have the same view on this?

        Jason Jones | Silversands Limited | Desk: +44 (0)1202 360489 |
Mobile: +44 (0)7971 500312 | Fax: +44 (0)1202 360900 | Email:
jason.jones@xxxxxxxxxxxxxxxxx <mailto:jason.jones@xxxxxxxxxxxxxxxxx> 

         

________________________________

        From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Harrison
        Sent: 14 January 2007 16:53
        To: isapros@xxxxxxxxxxxxx
        Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter Networks
        
        

        No; the Exch team (or certain author-wanna-bees, anyway).

        I've tech-reviewed three Exch-created docs last year and without
exception, they all carried this verbal virus with them.

        It's an incredible fight to get this removed and I have to admit
that I haven't been entirely successful.

         

        From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
        Sent: Sunday, January 14, 2007 8:36 AM
        To: isapros@xxxxxxxxxxxxx
        Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter Networks

         

        You mean the ISA UE is pushing the domain=bad crapola? How do
you tell a secure EAS publishing story without it?

         

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

         

                 

________________________________

                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Harrison
                Sent: Saturday, January 13, 2007 9:48 PM
                To: isapros@xxxxxxxxxxxxx
                Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter
Networks

                They do ask; they just don't listen.

                I was asked to review a doc on EAS via ISA that's coming
out soon and couldn't get them to drop the "ISA as domain member == bad"
mantra...

                 

                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Jones
                Sent: Saturday, January 13, 2007 3:46 PM
                To: isapros@xxxxxxxxxxxxx
                Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter
Networks

                 

                Can't believe they just make their own decision
terminology/security architecture rather than asking ISA product team
for advise on what they should be saying....maybe that is just me being
incredibly naive though ;-)

                 

________________________________

                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
                Sent: 13 January 2007 17:32
                To: isapros@xxxxxxxxxxxxx
                Subject: [isapros] Re: ISA, Exchange 2007 and Perimeter
Networks

                However, one thing I DON'T want to get back to is the
"single model" DMZ -- because the entire point of this conversation is
that there is a heterogeniety of DMZs and that the problem with the
Exchange team is that they didn't understand this in the first place. :)

                 

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

                 

                         

________________________________

                        From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
                        Sent: Saturday, January 13, 2007 11:23 AM
                        To: isapros@xxxxxxxxxxxxx
                        Subject: [isapros] Re: ISA, Exchange 2007 and
Perimeter Networks

                        It's interesting how the canaille misinterprets
the term DMZ, like they do for most things :)

                         

                        Think about the Korean DMZ -- is that really a
"free for all" place? Or one of the most monitored and secured areas in
the world, where nothing happens without someone knowing about it almost
immediately?

                         

                        That what you get when the Syphco reps teach a
generation of "port openers"....

                         

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

                         

                                 

________________________________

                                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thor (Hammer of God)
                                Sent: Friday, January 12, 2007 5:51 PM
                                To: isapros@xxxxxxxxxxxxx
                                Subject: [isapros] Re: ISA, Exchange
2007 and Perimeter Networks

                                Interesting... Probably a good idea for
us to actually articulate what we really mean when we say DMZ.
                                
                                I guess to some it means "free for all
network" but for me, it should be the network where you have the most
restrictive policies controlling each service so that it is obvious when
malicious traffic hits the wire.  Thoughts>
                                t
                                
                                
                                On 1/12/07 3:30 PM, "Steve Moffat"
<steve@xxxxxxxxxx> spoketh to all:

                                That's what I thought, now it's what I
know....
                                 
                                
                                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Harrison
                                Sent: Friday, January 12, 2007 6:35 PM
                                To: isapros@xxxxxxxxxxxxx
                                Subject: [isapros] Re: ISA, Exchange
2007 and Perimeter Networks
                                
                                Aside from normal router & switch ACLs,
ISA is the single line of defense.
                                "..we don't need no stinking DMZs"
                                 
                                
                                From: isapros-bounce@xxxxxxxxxxxxx
[mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Moffat
                                Sent: Friday, January 12, 2007 12:12 PM
                                To: isapros@xxxxxxxxxxxxx
                                Subject: [isapros] Re: ISA, Exchange
2007 and Perimeter Networks
                                
                                Ahh...just had a thought.
                                 
                                It's all labeling.
                                 
                                Jason, and others (not Jason's fault),
have been using the term DMZ.
                                 
                                Historically, is the term DMZ not taken
literally as being completely firewalled off from the trusted networks,
and what Jason is talking about is trusted network segmentation.
                                 
                                I betcha that's why the Exchange team
don't support it...they think it's a typical run of the mill DMZ...
                                 
                                Jim, isn't MS's Internal network
segmented by usin ISA?? Including your mail servers?
                                 
                                S 

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Follow-Ups:
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[isapros] Re: ISA, Exchange 2007 and Perimeter Networks

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