XFOR: How to Configure Authenticated TURN

ID: q194501

The information in this article applies to:

Microsoft Commercial Internet System version 2.0
Microsoft Internet Information Server version 4.0

SUMMARY

This article explains how to enable Authenticated TURN (ATRN) on the Microsoft Commercial Internet System 2.0 Mail Service or the Microsoft Internet Information Server (IIS) 4.0 SMTP service.

This functionality has been added to the IIS 4.0 SMTP service in Service Pack 4 for Windows NT Server.

MORE INFORMATION

ATRN is a mechanism that allows systems with dynamic IP addresses to retrieve SMTP mail. The following paragraph describes how ATRN works.

The initial client and server roles are short-lived, as the point is to allow the intermittently-connected host to request mail held for it by a service provider. The customer (client) initiates a connection to the provider (server), authenticates, and requests its mail. The roles of client and server then reverse, and a normal ESMTP conversation proceeds. Unlike ETRN, an ATRN conversation takes place within the same TCP connection, therefore eliminating the need for a static IP address.

For more information on ATRN, please refer to the current internet draft entitled "ON-DEMAND MAIL RELAY (ODMR)" by R. Gellens.

Configuring ATRN

To configure the mail services for ATRN, you will need to run a script. The following is a very basic Visual Basic script that demonstrates how to set the keys needed for ATRN. The values are written in the script. It runs without trace messages, and the ONLY thing it does is configure a domain called test.com to queue mail for ATRN.

You can modify this script to set ATRN for another domain by changing the value for rAction. The username and password can be changed by modifying the values for rUser and rPass respectively. The virtual server can also be modified by changing the value for rSite.

The path in the GetObject statement controls which virtual server will be modified and takes the following form:

IIS://MachineName/SMTPSVC/n/Domain

where MachineName can be any computer name or LocalHost, and n is the nth service instance (also known as a site or a virtual server).

ATRN Script

Copy everything between <Start Script> and <End Script>, paste it into Notepad, save the file, and name it "Atrn.vbs," and then run the script using the following command at the MS-DOS prompt:

CSCRIPT ARTN.VBS

NOTE: The Windows NT Option Pack (required to install MCIS 2.0) installs the Windows Script Host by default. You can use Cscript.exe from the Windows Script Host to run this script.


   <Start Script>

   Dim MasterObj, NewDomObj, NewMetaObj, rAction, rType
   Dim rUser, rPass, rTurn, rSite

   rSite = 1
   rAction = "test.com"
   rType = "514"
   rUser = "TestUser"
   rPass = "password"

   Set MasterObj = GetObject("IIS://LocalHost/SMTPSVC/" & rSite & "/domain")
   set NewDomObj = MasterObj.Create ("IIsSmtpDomain",rAction)
   NewDomObj.KeyType = "IIsSmtpDomain"
   NewDomObj.SetInfo
 
   Set NewMetaObj = GetObject("IIS://LocalHost/SMTPSVC/" & rSite & "/domain/" & rAction)
   NewMetaObj.Put "AuthTURNList", rUser
   NewMetaObj.Put "RouteUserName", rUser
   NewMetaObj.Put "RoutePassword", rPass
   NewMetaObj.Put "RouteAction", rType
   NewMetaObj.Put "RouteActionString",rAction
   NewMetaObj.SetInfo

   <End Script>

NOTE: This script will return the following error message if run again without changing the domain name (rAction):

Cannot create a file when that file already exists

This script can only be used to create an ATRN domain, not modify an existing domain.

Additional query words: xfor turn aturn

Keywords :
Version : winnt:2.0,4.0
Platform : winnt
Issue type : kbhowto