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Outlook Web Access Through Firewall

By steve.ellwood ·
I have OWA running on an Windows 2003 server, with a Draytek Vigor firewall. I can access the OWA within the firewall but not from outside. I have seen plenty of messages saying just open ports 80 and 443 to allow access, but the Draytek has a web based admin so I figure if I open port 80 to my server I will not be able to access the f/w remotely.
So, I've changed the HTTP port on the IIS to 8181 (don't know if this is an ok port or not so please advise if not) and I can still access internally by specifying the port. However, if I open ports 8181 and 443 on the firewall I still can't get OWA externally.
Any suggestions or advice?

Thanks, Steve.

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by BFilmFan In reply to Outlook Web Access Throug ...

Are you running Exchange Front-End Processors? If so, is the FEP up there in the DMZ?

Port 80 should be open already if you have users passing traffic to and from the Internet.

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by Mikel~T In reply to Outlook Web Access Throug ...

you'll need to setup a rule on the firewall that will allow any outside request to port 8181 to be forwarded to the internal IP of your server...

Any outside user will need to type in Http://ip-of-pubilc-interface:8181 to connect on the new port.

I'd recommend using 443 since the username and password will be encrypted, and you can setup a Stand Alone Certificate Authority to generate your own certificate.

Hope this helps.

Mike

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by steve.ellwood In reply to Outlook Web Access Throug ...

- Don't think I'm running the Exchange Front-End Processor, should I be?
- Don't have a DMZ set-up, the set-up is a very simple single server system with exchange and file sharing running on a single server (it's only a small charity network).
- I don't think port 80 is open because it's not in any of the firewall settings and I need to use port 80 to get to the HTML config page on the router/firewall.

- I have tried setting the firewall to allow both port 8181 and 443 through but maybe I am doing something wrong. There are options for 'Port Redirection' which I am using to get the e-mail throught to the exachange server, and there is the ability to 'Open Ports' which should I be using?

- Using the port 8181 works fine inside the firewall so it is definately a problem there somewhere but I'm at a loss to know what I'm doing wrong.

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by Omnicef In reply to Outlook Web Access Throug ...

Check and see if you can administer the firewall via telnet. If you can and feel comfortable with it, go ahead and forward the port. Also, what about setting up Terminal Services and administering the firewall through that on the internal ip address?

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by steve.ellwood In reply to

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by steve.ellwood In reply to Outlook Web Access Throug ...

Thanks for help, I found a rule on the firewall that was blocking some of the incoming IP, so modified it to allow my ports thorugh, all works fine now.

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by steve.ellwood In reply to Outlook Web Access Throug ...

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