XADM: How to Configure Exchange Server with Proxy Server

Last reviewed: February 27, 1998
Article ID: Q181847

The information in this article applies to:

Microsoft Exchange Server, versions 4.0, 5.0, 5.5
Microsoft Proxy Server, version 2.0

SUMMARY

This article explains how to configure Microsoft Exchange Server to operate with Proxy Server 2.0 to handle incoming Internet client requests (this is known as "reverse-hosting"). SMTP servers and POP clients on the Internet must be configured to contact the Proxy Server computer through the appropriate port in order to communicate with the Exchange Server computer.

In addition, versions of the Wspcfg.ini file need to be placed in the directory where the server application's .exe files are installed. Because Exchange Server has more than one .exe file, more than one Wspcfg.ini file is needed in specific directories.

MORE INFORMATION

Add the following section to the first Wspcfg.ini file. This section is required for the Exchange SMTP service:
```
      [Msexcimc]
      ServerBindTcpPorts=25
      Persistent=1
      KillOldSession=1
```
Place this file in the directory where the Msexcimc.exe file is located. The default directory path is \exchsrvr\connect\msexcimc\bin.

3. Confirm that the SMTP port is bound to the Proxy Server computer's port

25.

4. The second Wspcfg.ini file contains entries needed for the Exchange

   Store (Store.exe), as follows:

      [Store]
      ServerBindTcpPorts=110,119,143
      Persistent=1
      KillOldSession=1
   Additional ports can be listed in this because Store.exe sets POP mail
   on port 110, NNTP on port 119, and IMAP4 on port 143.

Place this second Wspcfg.ini file in the directory where Store.exe is located. The default directory path is \exchsrvr\bin.

Verify that your DNS MX records point to the Proxy Server computer and not to the Exchange Server computer. Because the MX record is different from the regular GetHostByName call, you must configure network TCP/IP properties, using Control Panel, to use DNS for the Exchange Server computer. The WinSock Proxy client application automatically redirects the DNS MX request.

Stop and restart the Exchange services, or restart the Exchange Server computer, for the new settings to take effect. You should be able to contact the Exchange Server computer by connecting to the Proxy Server computer's external IP address using SMTP, NNTP, or POP protocols.

NOTE: If you have an internal DNS server on your network, you can use DHCP to configure the internal server. This will allow you to use both internal and external DNS servers to resolve names on your internal network and on the Internet.

For additional information on configuring Exchange Server with Proxy Server, refer to the following Microsoft Knowledge Base article: Q176771, "Using MS Exchange or Other SMTP Mail Servers with Proxy Server 2.0"

Additional query words: proxysvr winsock client
Keywords : XADM XFOR XGen kbusage kbfaq
Technology : Internet
Version : WINDOWS:4.0,5.0,5.5; WINNT:2.0
Platform : WINDOWS winnt
Issue type : kbhowto

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Last reviewed: February 27, 1998
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