An update is available for ISA Server 2006 to control the domain name and user name format in Kerberos Constrained Delegation scenarios

INTRODUCTION

In Microsoft Internet Security and Acceleration (ISA) Server 2006, you publish a Web site by using Kerberos Constrained Delegation. Depending on the Web site, you may want to change how ISA Server requests the Kerberos ticket of an authenticated user.

By default, ISA Server 2006 uses the "Domain NETBIOS name\User" format when it requests the Kerberos ticket. Therefore, the domain name and the user name in the Kerberos ticket will resemble the following:

User: FirstName.LastName
Realm: MyCompany However, some Web sites require the fully qualified domain name (FQDN) in the Kerberos ticket. In this scenario, the domain name and the user name in the Kerberos ticket should resemble the following:

User: FirstName.LastName
Realm: MyCompany.EMEA.INTRA

More Information

An update is now available that lets you control the domain name and user name format in Kerberos Constrained Delegation scenarios. To apply this update, follow these steps:

1. Download the hotfix rollup package that is mentioned in Microsoft Knowledge Base article 960148.
   
   

   960148 Description of the ISA Server 2006 hotfix package: November 19, 2008
   
   

2. Install the hotfix rollup package on all ISA Server computers.

3. Start Notepad.

4. Paste the following script into the Notepad file.

   Const SE_VPS_GUID = "{143F5698-103B-12D4-FF34-1F34767DEabc}"
   Const SE_VPS_NAME = "UseFQDNinKerberosTicket"
   Const SE_VPS_VALUE = 2
   
   Sub SetValue()
   
       ' Create the root obect.
       Dim root  ' The FPCLib.FPC root object
       Set root = CreateObject("FPC.Root")
   
       'Declare the other objects needed.
       Dim array       ' An FPCArray object
       Dim VendorSets  ' An FPCVendorParametersSets collection
       Dim VendorSet   ' An FPCVendorParametersSet object
   
       ' Get references to the array object
       ' and the network rules collection.
       Set array = root.GetContainingArray
       Set VendorSets = array.VendorParametersSets
   
       On Error Resume Next
       Set VendorSet = VendorSets.Item( SE_VPS_GUID )
   
       If Err.Number <> 0 Then
           Err.Clear
   
           ' Add the item
           Set VendorSet = VendorSets.Add( SE_VPS_GUID )
           CheckError
           WScript.Echo "New VendorSet added... " & VendorSet.Name
   
       Else
           WScript.Echo "Existing VendorSet found... value- " &  VendorSet.Value(SE_VPS_NAME)
       End If
   
       if VendorSet.Value(SE_VPS_NAME) <> SE_VPS_VALUE Then
   
           Err.Clear
           VendorSet.Value(SE_VPS_NAME) = SE_VPS_VALUE
   
           If Err.Number <> 0 Then
               CheckError
           Else
               VendorSets.Save false, true
               CheckError
   
               If Err.Number = 0 Then
                   WScript.Echo "Done with " & SE_VPS_NAME & ", saved!"
               End If
           End If
       Else
           WScript.Echo "Done with " & SE_VPS_NAME & ", no change!"
       End If
   
   End Sub
   
   Sub CheckError()
   
       If Err.Number <> 0 Then
           WScript.Echo "An error occurred: 0x" & Hex(Err.Number) & " " & Err.Description
           Err.Clear
       End If
   
   End Sub
   
   SetValue
   

5. Save this file to one of the ISA Server 2006 computers. Use the .vbs file name extension. For example, name the file ISA2006UseFQDNInKerberosTicket.vbs.

6. Double-click the .vbs file to run the script.

Note The script in this procedure uses the default value for the Const SE_VPS_VALUE property (Const SE_VPS_VALUE = 2). You can change this value according to the following list:

• If you set Const SE_VPS_VALUE = 0, the domain NETBIOS name is used for the domain name.
  Sample:
  User: FirstName.LastName
  Realm: MyCompany

• If you set Const SE_VPS_VALUE = 1, the user principal name (UPN) is used for the user name, and the FQDN is used for the domain name.
  Sample:
  User: FirstName.LastName@MyCompany.EMEA.INTRA
  Realm: MyCompany.EMEA.INTRA

• If you set Const SE_VPS_VALUE = 2, the FQDN is used for the domain name.
  Sample:
  User: FirstName.LastName
  Realm: MyCompany.EMEA.INTRA