TMG2010 - Front-End (DMZ) / Back-End (Internal) - Reverse Publishing. Exchange 2010

Hey Guys,
I need some help conceptually understanding how TMG2010 is used in a front-end back end scenario. For Example:
1) The client would have TMG2010 in the DMZ
2) The client would have TMG2010 in the Internal Network.
3) The client would have multiple Network Cards (2-Leg's) on each of the TMG boxes
My question is definitely design related so my apologies if its a little confusing. Would the correct way of setting up TMG securely be the way i have described? If so how would you set the Auth type? Do you know of any design documents that cover my scenario?
What i am really confused about is the Authentication Type for each of the TMG servers (Front-End, Back-End) and if those servers would both be joined to the domain or not.
Thanks,
Robert
Robert

Hi Robert,
Various way to do it however below are one method of Doing it.
Internal TMG
Internal TMG can be joined to Domain
Two LEG TMG
Once NIC connected to Internal network Switch
Other NIC Connected to DMZ Switch ( Which Routes Traffic to External TMG internal Interface )
External
Workgroup
One NIC connecting to internet Router
Other NIC connecting to DMZ switch
Network relationship can be NAT between TMG, You can use the Internal TMG as Proxy / Web Publishing / Server Publishing etc. Use the External TMG as plain firewall and to NAT Internet Inbound Request to back end Firewall External Interface IP address. Malware
/ NIS can be enabled as per your requirement on any one of the TMG.
Additional to It
You can Configure one More LEG a third Interface on Both TMG
Configure External DMZ on the Third Interface on External TMG. External DMZ will be only Internet Facing
Configure Internal DMZ on the Third Interface of Internal TMG. You can Use it as Inside DMZ.
Hope this helps
Thanks for the response. But what about the Authentication? How would that be setup? I am still unclear on that part of it. For Example:
In my lab i have the following:
1) Single Armed TMG server
2) Auth set to NTLM/Integrated on both TMG and Exchange (OWA). Other Auth settings for other exchange services
3) Single Listener, SSO Across AD Sites
4) TMG is only providing Reverse Publishing, no other network security services.
If I added another TMG server as a front end how would i configure the Authentication for the above scenario?
Thanks,
Robert
Robert

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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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<< Moderator message - Please do not promise points >>
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Edited by: Rob Burbank on Dec 2, 2011 9:26 AM

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Custom F4 is working properly.
Below i am specifing one test case which is my program failed.
i entered 2 new records by choosing F4 help. The 2nd record only inserted in data base.
Please help me....
Thanks in Advance

Hello Siva
Some people like to do extensive coding in the event handler method for DATA_CHANGED.
I do NOT belong to these people.
My recommendation is (almost) always the same:
- If required store values in (static) attributes of your event handler class / instance
- Trigger PAI (using method CL_GUI_CFW=>SET_NEW_OK_CODE)
At PAI of your screen you can now easily work with your OUTTAB itab used for the ALV list.
Regards
Uwe

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You can have a pure animation effect done in Flash with just a gif, which can look very sexy and very cheap in terms of file size. This can be stuck on with ImageIcon blah ... --> ...new JLabel(blah), which is nice and easy or you can also use Graphics.drawImage(...) too. Alternately with JMF you can have some Flash based buttons and the like, though limited as I've said - I have done this with the help of the local library I tracked down a half decent Falsh 2.0 book and the local university a Flash 2.0 CD - Some effort! Worth it? It was very nice in the end ...but, really worth it? - no.
My advice: stick to pure java and simple animated gifs for thing such as splash screens.

Message looping between Exchange 2003 & Exchange 2010 after domain type changed to internal relay

Hi
We have a coexistence environment where we are currently migrating from Exchange 2003 to 2010 and have 80% of the users already on the Exchange 2010 platform. This is all within the same AD forest, let's call it FOREST1.AD.
The problem I'm seeking help about is a message routing problem we had this morning where messages bound for the Exchange 2003 users started looping between Exchange 2003 and Exchange 2010. The problem started as a result of changing the accepted domain
type to 'internal relay domain' for the purposes of establishing SMTP namespace sharing with an external Exchange environment (different forest, let's call it FOREST2.AD). The expectation was that after changing the domain type from authoritative to 'internal
relay domain', Exchange 2010 would route messages for unknown recipients to the external environment and that would be the only effect of the change. The message routing to the external environment worked completely OK. However, later we noticed that Exchange
2003 stopped delivering messages to its local users and started routing them to Exchange 2010 which would route the messages back to Exchange 2003 as that's where the recipients existed, only to have Exchange 2003 send them back to Exchange 2010 again.
The Send connector to route the messages, for the shared namespace, to the external environment used the Exchange 2010 server as the source server. It makes sense and is expected that Exchange 2003 would send messages for any unknown recipients to Exchange
2010 for onward delivery via the Send connector. But it is not expected for Exchange 2003 to not deliver messages to its own users using the store driver and instead routing them on to Exchange 2010.
We fixed the problem by reversing the change and not only changed the domain type back to authoritative but also removed the Send connector for the specified shared namespace. However, we do need to understand why this problem happened and how to stop it
from happening.
We did test the shared SMTP namespace configuration using a test domain before applying the change to the domain that is used for production email traffic. Test users on Exchange 2003 with email addresses on the test domain did not experience this looping
problem. This has been tested again after the production domain experienced the problem and there is no looping for the test domain. The only difference I noticed between the configuration for the test domain and the production domain is that while both domains
existed as accepted domains of type 'internal relay domain' in Exchange 2010, there was a difference in configuration in Exchange 2003 where the test domain was not present on the recipient policy at all and the production domain was present there.
This also makes me wonder if Exchange 2003 and Exchange 2010 in the same organization keep a separate configuration to determine which domain they are authoritative for. When you install Exchange 2010, it does add all the domains on the recipient policies
to the accepted domains configuration but any new domains you add in accepted domains in Exchange 2010 are not added to the legacy recipient policy object.
Can someone please help clarify these grey areas and explain why the message looping was created and how to avoid it. I'm happy to provide any further information.
Thanks
Nauman.

Hello,
Why do you want to use the 'internal relay domain' authentication?
Thanks,
Simon Wu
TechNet Community Support

TMG2010 - Front-End (DMZ) / Back-End (Internal) - Reverse Publishing. Exchange 2010

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