Access OWA 2003 from the internet using Linux firewall


If someone could help me with the following issue it would be greatly appreciated
I have setup a SBS 2003 machine standard install
OWA installed by default
I have a linux firewall and I have registered the external IP of the Firewall as the my IP.
On the firewall I have forwarded the following ports to my SBS server
80 / 88 / 443 / 691 / 389 / 3268 / 3268
If I am missing some or if some are not needed please let me know.

So if there is something I am missing please let me know as it is important that I get this issue resolve asap and it is currently not working

All help is welcome and will be appreciated

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the default address to access owa out of the box is:


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What kind of error message do you see on the clients IE?
*You might want to turn off "Show Firendly HTTP Error Messages"
Tools menu --> Internet Options --> Advanced

1. Is the Windows Firewall turned off in the Services?

2. Can people access a basic html page on your web server without having to go through any Exchange kafuffle?

3. Can the client computer telnet to one / all of your webserver ports via a domain name?(Windows) Start menu --> cmd --> run --> telnet 80

4. Marines example has SSL links in it, so it probably is not a caching problem. but..  I have seen issue getting to / past the initial logon page, 401 errors. Turn off the proxy on the client for the sake of testing, or make a caching rule on the proxy not to cache urls containing.


5. You might also want to check how IE is set to prompt for credentials.
Tools menu --> Internet Options --> Secrurity --> Custom Button --> Scroll to the bottom of list and check settings.

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