OWA Setup - HELP PLS
From: sonny (anonymous_at_discussions.microsoft.com)
Date: 03/03/04
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Date: Wed, 3 Mar 2004 11:03:58 -0800
XWEB: How to Configure OWA to Connect to Exchange Through
a Firewall
View products that this article applies to.
This article was previously published under Q259240
IMPORTANT: This article contains information about
modifying the registry. Before you modify the registry,
make sure to back it up and make sure that you understand
how to restore the registry if a problem occurs. For
information about how to back up, restore, and edit the
registry, click the following article number to view the
article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SUMMARY
This article describes how to set up Microsoft Outlook Web
Access (OWA) to connect to Microsoft Exchange Server
through a firewall. This configuration assumes that there
is a firewall between OWA and the Exchange Server
computer. There are three ports that need to be opened on
the firewall in this configuration. On the Exchange Server
computer, two ports need to be statically mapped. To do
this, the ports must be opened by editing the registry.
NOTE: The third port, port 135, must be opened on the
firewall.
MORE INFORMATION
Follow the steps in this section to statically map the two
ports on the Exchange Server computer. The Exchange Server
computer that OWA points to must have these ports mapped.
NOTE: One port must be mapped for the information store,
and one port must be mapped for the directory.
For additional information about configuring Exchange
Server services for Internet firewalls, click the article
number below to view the article in the Microsoft
Knowledge Base:
155831 XADM: Setting TCP/IP for Exchange and Outlook
Client Connects Through a Firewall
WARNING: If you use Registry Editor incorrectly, you may
cause serious problems that may require you to reinstall
your operating system. Microsoft cannot guarantee that you
can solve problems that result from using Registry Editor
incorrectly. Use Registry Editor at your own risk.
Start Registry Editor (Regedt32.exe).
Locate the following key in the registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExch
angeDS\Parameters
Add the following entry for the Microsoft Exchange
Directory service:
Entry: TCP/IP port
Type: REG_DWORD
Data: port number to assign
NOTE: Do not assign ports immediately above the 1023
range. This may cause other problems on the Exchange
Server.
For example:
"TCP/IP Port"=dword:000004C9(1225)
Locate the following key in the registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExch
angeIS\ParametersSystem
Add the following entry for the Exchange Server
information store:
Entry: TCP/IP port
Type: REG_DWORD
Data: port number to assign
NOTE: Do not assign ports immediately above the 1023
range. This may cause other problems on the Exchange
Server computer.
For example:
"TCP/IP Port"=dword:000004CA(1226)
Quit Registry Editor.
Restart your computer for the changes to take effect.
On the firewall, open the ports that you assigned to the
directory, the information store, and port 135 for the
endpoint mapper.
NOTE: For the Exchange Server to communicate back through
the firewall to the OWA server it is also necessary to
have the ephemeral ports 1024 through 65535 configured for
outbound communications from the Exchange server to the
OWA server. Although you can specify what ports Exchange
listens on for RPC traffic, you can not specify what RPC
ports the OWA application uses for RPC communications.
NOTE: The OWA server must also be a member of the domain
where the mailboxes reside. For additional information
about how to configure that access, click the article
number below to view the article in the Microsoft
Knowledge Base:
179442 How to Configure a Firewall for Domains and Trusts
Hope it helps
Sonny
>-----Original Message-----
>I am trying to setup OWA on my Exchange Server. I am NOT
>running a front-end back-end type scenario, I only have a
>single Exchange 2000 Server and it is behind a CISCO
>Router/Firewall. I can get an OWA logon from an Internet
>Explorer page internally and get into a user's mailbox,
>but when I try to type http://server.domain/exchange from
>home or an outside address, I get "Page cannot be found".
>Do I have to open up more ports in my firewall?? I am
>allowing SMTP, POP3 traffic through because we send and
>receive emails to outside sources fine.
>
>any suggestions would be appreciated.
>
>.
>
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