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Outlook Web Access through NAT

By cj_mcnix ·
I am currently in the first phases of testing Outlook Web Access. I am now at the point where I have it up and running on our internal network (I can access both the IIS 4.9 default page, and the Exchange server login from within the network using the IP address). This is what the test box looks like:

NT 4.0 SP6a
Exchange 5.5 SP3
IIS 4.0

I understand it's not W2K or Exchange 2000, etc. I am not interested in that kind of advise yet. I just want to show my boss that it can be done beforewe update it all.

We are using NAT in the office. The boss has mapped his IP address (through the Netopia router) to the single useable static IP address assigned to the DSL circuit so that he can use PCAnywhere (it works). I shut him down and used his IP address on the exchange server. I then had a remote user try to access the exchange server using the IP address. It did not work. He could ping the IP address, but was not able to even access the IIS 4.0 default page through his browser.What do I need to do? I also understand that I have no proxy server or other means of protection. I am simply trying to get the basic system running. Once that's done, I can start to upgrade and improve as needed. But right now, I need the starting point of a functional OWA server to build upon.

Thank you.

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Outlook Web Access through NAT

by cportman In reply to Outlook Web Access throug ...

Does your netopia router allow port forwarding - if so all you have to do is forward port 80 to the private address of your exchange server.

In your current situation you need to make sure the default web site in IIS is assigned to that static address. if not assign it and then restart iis.

It should work unless your router is blocking inbound port 80

good luck
cp

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Outlook Web Access through NAT

by cj_mcnix In reply to Outlook Web Access throug ...

Poster rated this answer

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Outlook Web Access through NAT

by curlergirl In reply to Outlook Web Access throug ...

If your router is doing any packet filtering (which it probably is by default), you will have to set up packet filter exceptions to allow incoming port 80, 110 (if you need POP3), 25 - which must be already enabled if you're getting external email, and there are also some other things that need to be done so that Exchange can communicate through your router. You could try initially, as a test, turning off all packet filtering on the router and see if it works under those conditions. There aresome TechNet articles on this, but I don't have access to my list right now. If you want the numbers, please email me and I will send them to you when I'm back in the office. I'll also send you an article about how to properly set up pcAnywhere behind a router with a single IP without routing all incoming exclusively to your boss's workstation. By the way, you DO have a means of protection if your router is doing NAT and packet filtering - this is what a basic firewall is. . .Hope this helps!

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Outlook Web Access through NAT

by cj_mcnix In reply to Outlook Web Access throug ...

After a 3 hour power outage, our router came back up and miraculously, it synched up fine and I could telnet in. I found a website that detailed enabling ports 110, 80 and 25 on my particular router. Once I restarted the router, it worked like a champ!

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Outlook Web Access through NAT

by cj_mcnix In reply to Outlook Web Access throug ...

third time's the charm:

I failed to telnet into my router to check the settings. A call to the ISP revealed that Rhythms (our DSL circuit provider) is out of business. Our circuit should have been killed over a week ago. My boss does not want me to reset the router or management port into it for fear of not resynching on a reboot.
I apologize. As soon as our new circuit provider gets here, I will try your suggestions and then close the question and issue points.

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Outlook Web Access through NAT

by cj_mcnix In reply to Outlook Web Access throug ...

This question was closed by the author

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