Microsoft KB Archive/901109

= The dial-up connection to a remote network is continually dialed when a client computer makes a request for a URL that is not defined in any LDT in ISA Server 2004 =

Article ID: 901109

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition
 * Microsoft Internet Security and Acceleration Server 2004 Standard Edition

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SYMPTOMS
In Microsoft Internet Security and Acceleration (ISA) Server 2004, when a client computer makes a request for a URL that is not defined in any Local Domain Table (LDT), the dial-up connection to a remote network is continually dialed if a Dial on Demand connection is configured to connect to a remote network.

Notes
 * ISA Server 2004 does not usually have to dial the remote network for Internet URLs.
 * ISA Server 2004 should only dial the remote network if the requested URL is in the LDT for the remote network or if a requested Internet Protocol (IP) address matches the IP address of the remote network.



CAUSE
This problem occurs because ISA Server 2004 does not know whether to use a DNS server on the remote network to resolve the requested URL. Therefore, ISA Server 2004 dials the remote network to determine whether there is an available DNS server for the requested URL.



Service pack information
To resolve this problem, obtain the latest service pack for Internet Security and Acceleration Server 2004. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

891024 How to obtain the latest ISA Server 2004 service pack

Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To apply this hotfix on an ISA Server 2004, Standard Edition-based computer, you must have ISA Server 2004 Service Pack 1 (SP1) installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

891024 How to obtain the latest ISA Server 2004 service pack

Restart requirement
If you are prompted to restart the computer, you must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version          Size  File name --  05-Jun-2005  07:32  4.0.2163.271  365,792  Msphlpr.dll

After you apply the hotfix
After you apply the hotfix that is described in this article, enable the DontDialToGetADnsServer flag. When this flag is enabled, the connection will not be dialed if the requested URL is not defined in any LDT.

To enable the DontDialToGetADnsServer flag, use the following script: Sub AddHotFixVPSValue(ValueName, Mode)

' Create the root obect. Dim root ' The FPCLib.FPC root object Set root = CreateObject(&quot;FPC.Root&quot;)

'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( &quot;{143F5698-103B-12D4-FF34-1F34767DEabc}&quot; ) If Err.Number <> 0 Then Err.Clear if Mode= true then ' Add the item Set VendorSet = VendorSets.Add( &quot;{143F5698-103B-12D4-FF34-1F34767DEabc}&quot; ) CheckError WScript.Echo &quot;New VendorSet added... &quot; & VendorSet.Name else WScript.Echo &quot;VendorSet {143F5698-103B-12D4-FF34-1F34767DEabc} doesn't exist, no need to disable&quot; WScript.Quit end if   Else WScript.Echo &quot;Existing VendorSet found... &quot; & ValueName & &quot;=&quot; & VendorSet.Value(ValueName) End If

if VendorSet.Value(ValueName) <> mode then Err.Clear VendorSet.Value(ValueName) = mode If Err.Number <> 0 Then CheckError Else VendorSets.Save false, true CheckError If Err.Number = 0 Then WScript.Echo &quot;Saved - &quot; & ValueName & &quot;=&quot; & VendorSet.Value(ValueName) End If       End If    Else WScript.Echo ValueName & &quot;=&quot; & VendorSet.Value(ValueName) & &quot;,No change needed!&quot; End If End Sub

Sub CheckError If Err.Number <> 0 Then WScript.Echo &quot;An error occurred: 0x&quot; & Hex(Err.Number) & &quot; &quot; & Err.Description Err.Clear End If End Sub

'main Dim args,FlagName,Mode Set args = Wscript.Arguments if args.Count < 2 then WScript.echo &quot;This script sets a VPS flag for ISA2004 hotfixes&quot; WScript.echo &quot;Usage: AddHotFixVPSValue  &quot; WScript.echo &quot;Examples:&quot; wscript.echo &quot;To set the flag DontDialToGetADnsServer run: &quot; WScript.echo &quot;     AddHotFixVPSValue DontDialToGetADnsServer ENABLE&quot; WScript.echo &quot;To disable the flag run: &quot; WScript.echo &quot;     AddHotFixVPSValue DontDialToGetADnsServer DISABLE&quot; WScript.Quit end if

'Parse Command line FlagName = args(0) select case UCASE(args(1)) case &quot;DISABLE&quot; Mode =false case &quot;ENABLE&quot; Mode = true case else WScript.echo &quot;Second parameter should be ENABLE/DISABLE&quot; WScript.Quit End select

AddHotFixVPSValue FlagName, Mode



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Internet Security and Acceleration Server 2004 Service Pack 2.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

885957 How to install ISA Server hotfixes and updates

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbbug kbfix kbqfe kbpubtypekc kbhotfixserver KB901109

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