[isalist] Re: Looking for pitfalls

Thank you to all participants.

As I've read the responses, I have been doing the Hokey Pokey ;-)
As of right now...I am bailing on this scenario. It sounds like a fun challenge for someone other than me. 

Thanks again.

JB
On Oct 10, 2007, at 9:28 AM, Thomas W Shinder wrote:
OK, so there are two different domains, each on a different ISA Firewall Network. Therefore, that brings Jim's concerns into play if you want to create a trust between these networks.
So, if you want strong outbound access control with user/group outbound authentication, you'll only have it for one of the domains, and the ISA Firewall will be joined to that domain.
If you want strong authenticated outbound access control for only HTTP/HTTPS/FTP(over Web proxy), then you can use RADIUS Proxy and RADIUS servers. Have fun with that ;) (undocumented, but theoretically it should work)
If your publishing OWA sites for both domain, that's totally no brainer easy with LDAP authentication. 

The ISA Firewall doesn't pre-auth RDP, so it doesn't matter.
For VPN, you get to learn about RADIUS and RADIUS Proxy and how to make it work with the ISA firewall (undocumented, but theoretically should work) 

HTH,
Tom

Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- Microsoft Firewalls (ISA)
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist- bounce@xxxxxxxxxxxxx] On Behalf Of JB 
Sent: Wednesday, October 10, 2007 11:14 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

The Domains are separate and do not need to talk to each other.

No cross traffic between domains is necessary.

Original question:

Scenario:
Both domains are Windows 2003.
Both domains have Exchange servers publishing OWA etc...
Both domains have users requiring RDP and VPN access
All users except admins are not allowed into opposing network


<New-Network.jpg>

On Oct 10, 2007, at 8:58 AM, Thor (Hammer of God) wrote:


http://www.ISAserver.org
-------------------------------------------------------

Wait- you mean if the ISA is not a member of any domain, that you can
create LDAP Authentication Server sets to authenticate to a "foreign"
domain?  Doesn't that mean credentials will be passed in the clear in
that case??

And we're not talking about cross-domain traffic "crossing ISA
boundaries" - this is just two different domains behind ISA.

t

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist- bounce@xxxxxxxxxxxxx] 
On Behalf Of Jim Harrison
Sent: Wednesday, October 10, 2007 8:40 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

http://www.ISAserver.org
-------------------------------------------------------
That's not true either; ISA can use LDAP to authenticate foreign domain accounts without being a member of either - that's exactly why we added 
LDAP auth.
It's the cross-ISA domain traffic that makes it nearly impossible.
IOW, if there exists any form of cross-domain trusted traffic that
crosses ISA boundaries, you will have problems.

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist- bounce@xxxxxxxxxxxxx] 
On Behalf Of Thor (Hammer of God)
Sent: Wednesday, October 10, 2007 8:30 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

http://www.ISAserver.org
-------------------------------------------------------
Not at all... it is only an "issue" if you need AD-based authentication 
for both domains. If so, then you'll just need to create a trust (one
way will work just fine). What "cross-trust issues" are you referring
to?

t

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist- bounce@xxxxxxxxxxxxx] 
On Behalf Of JB
Sent: Wednesday, October 10, 2007 8:07 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

http://www.ISAserver.org
-------------------------------------------------------

So.... All would agree that having two domains behind ISA 2006
creates enough complexity (for one who does not enjoy cross-trust
relationship between domains issues) for it to be impractical?

JB


On Oct 8, 2007, at 8:53 AM, Jim Harrison wrote:


http://www.ISAserver.org
-------------------------------------------------------

Actually, it's both.
Domain traffic across ISA is a great reason to increase your
illicit substance use.
Have a peek at the RPC-oriented fixes in ISA; nearly all of them
have been driven by domain scenarios; some because of RPC protocol
changes in the OS.

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-
bounce@xxxxxxxxxxxxx] On Behalf Of Thor (Hammer of God)
Sent: Monday, October 08, 2007 8:33 AM
To: isalist@xxxxxxxxxxxxx; isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

That's what I was going to say ;)

It's not "multiple domains behind ISA," it's the way you want trust
to work within those "multiple domains behind ISA."

If you don't have some sort of cross-trust relationship between the
domains, only users within the domain that the ISA server is a
member of can use rules that require user authentication (including
certificates).

t

________________________________

From: isalist-bounce@xxxxxxxxxxxxx on behalf of Jim Harrison
Sent: Fri 10/5/2007 12:49 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls



http://www.ISAserver.org <http://www.isaserver.org/>
-------------------------------------------------------

the question of cross-ISA domain / forest traffic is gonna make you
drink (more).

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-
bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
Sent: Friday, October 05, 2007 11:50 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

http://www.ISAserver.org <http://www.isaserver.org/>
-------------------------------------------------------

Ha! I'll brew a pot on your behalf and I already have the skittles
in my
desk drawer :)

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-
bounce@xxxxxxxxxxxxx]
On Behalf Of JB
Sent: Friday, October 05, 2007 1:37 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: Looking for pitfalls

http://www.ISAserver.org <http://www.isaserver.org/>
-------------------------------------------------------

Brilliant!!!

How do I send you a pot of coffee and bag of skittles? ;-)
On Oct 5, 2007, at 11:28 AM, Thomas W Shinder wrote:


http://www.ISAserver.org <http://www.isaserver.org/>
-------------------------------------------------------

Sounds like an excellent scenario for an article! I'll pound it out
this
weekend.

Thanks!

Tom

-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-
bounce@xxxxxxxxxxxxx]
On Behalf Of JB
Sent: Friday, October 05, 2007 12:12 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Looking for pitfalls

I would like to indulge the minds of ISA List on the pitfalls of
having
two separate networks/domains behind one ISA 2006 firewall.
The main question: How does authentication in ISA 2006 work with two 
domains?

Any thoughts would be greatly appreciated - I should probably
rephrase
this ;-)

Scenario:
Both domains are Windows 2003.
Both domains have Exchange servers publishing OWA etc...
Both domains have users requiring RDP and VPN access All users except 
admins are not allowed into opposing network


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