Setting up ISA 2006 in a DMZ on one NIC

I have a system (VMWare ESX with single virtual NIC available) with Server 2003 and ISA 2006. This client is moving in a month and need to setup a proxy between the internet and inside. I can set firewall rules for HTTPS (for OWA and RPC over HTTP), SMTP, etc and have them go to the DMZ port where the ISA server will be stationed. Once the traffic is in the DMZ (on a Snapgear) , I need to setup the ISA to then send it to the internal IP (I can route through the firewall potentially). This needs to be done for a few ports for development, mail, HTTP over RPC, and HTTPs.

I also need to have all internal traffic go through this DMZ port to then be converted to the outbound internet traffic.

An ASCII diagram:

                               INTERNET ----- Firewall ------ Internal (192.168.5.0)
                                                          |
                                                          |
                                                          |
                                                      DMZ (192.168.4.0)

So email comes in through internet, Firewall points it to the DMZ, DMZ then pushes to the mail server on the .5 subnet.


Questions:

1) Can this be done on one NIC? How is the best way to set this up with the three networks on the ISA server? (I see the configuration on the ISA server for local, external, and quarantine zones).
2) Will this work within ESX?
3) I have heard of issues with ISA and things like OWA and HTTP over RPC. Any recommendations?



kirk_lesserAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

lecafCommented:
1. I don't think its possible you need 2 NICS (Isa merit this ¬10 investment)
2. why not
3. works fine ISA is the only FW (I knwo of) able to filter RPC over HTTP so you need it.

I already used this desing

Internet ----- FW ----- ISA ----- DMZ with front end (exchange)
                                    -
                                    -
                                    FW  -----  LAN


m  a r  c  
0
kirk_lesserAuthor Commented:
Anyone else agree/disagree?
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Forefront ISA Server

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.