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OWA through a Firewall?

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by mjacobson

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Wondering if it's possible to run OWA either through or on our firewall server. We are running NT 4 SP6a on all servers, Exchange 5.5 SP3 on the mail server, and Gauntlet 5.5 as our firewall.

As a test I installed IIS 4.0 on a BDC and setup OWA on that. Works great on our internal network, but cannot be accessed from other subnets or the internet.

Is there any way to make this work - install on the firewall?....other solution?

Any help would be great...

5 replies

by geikko

Not too sure about the firewall...I run it on mine and it works but I'm using MS Proxy....check the properties of the OWA web site and make sure the port settings and address corresponds correctly with the adapter address

by mckaytech

There are a couple ways to accomplish an OWA implementation through a firewall. If the IIS server is outside the firewall and the Exchange is inside the firewall, you'll want to read article Q259240 on MS Technet.

If you want to put both serversinside the firewall, you can do so with a DMZ setup where your Internet router sends OWA sessions to a separate subnet that is not part of your regular subnet. For information on this setup, see article Q238954 (although for the actual router setup, it just refers you back to the router mfg).

The other thing you'll need to decide is whether you are going to use SSL on the IIS server because that will impact which ports are enabled. It's probably wise to do that if your IIS server will be outside the firewall.

Also, Microsoft has an excellent white paper on OWA that addresses many of these issues.

paul

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