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ISA Server 2006 Service Pack 1 introduces a new alert that is named "Client Authentication Time Exceeded"

Microsoft Internet Security and Acceleration (ISA) Server 2006 Service Pack 1 (SP1) introduces a new alert that is named "Client Authentication Time Exceeded." When this alert is triggered, you receive the following message:
Client authentication time exceeded 5 seconds. This occurred 20 times during the past 5 minutes. To configure this setting, see the Microsoft Knowledge Base article 952082.
The "Client Authentication Time Exceeded" alert can be triggered by slow authentication requests. ISA Server 2006 triggers the alert only if there were more than 20 slow authentication requests in the last 5 minutes.

  • A slow authentication request is an authentication request that takes more than 5 seconds from ISA Server 2006 to an authentication server. The authentication server can be a domain controller, a Remote Authentication Dial-In User Service (RADIUS) server, or a Lightweight Directory Access Protocol (LDAP) server.
  • If the client uses NTLM authentication, ISA Server makes two separate authentication requests to the authentication server. For this alert, each authentication request is measured separately. The client response time between the two requests is not measured.
The "Client Authentication Time Exceeded" alert has the following three parameters:
  • FireSlowAuthenticationEventAuthenticationDurationThresholdSeconds
    This parameter represents the threshold in seconds greater than which the authentication request is considered slow. By default, the value of this parameter is 5 seconds.
  • FireSlowAuthenticationEventIntervalDurationMinutes
    This parameter represents the interval in minutes during which many slow authentication requests may trigger the alert. By default, the value of this parameter is 5 minutes.
  • FireSlowAuthenticationEventAfterNumTimesInInterval
    This parameter represents the number of slow authentication requests that can be received during the interval before the alert is triggered. By default, the value of this parameter is 20 requests.
To configure these parameters, follow these steps:
  1. Copy and then paste the following script into an instance of Notepad, and then save it as Configure_slow_authentication_alert.vbs.

    Note You can change the values of the parameters in the beginning of the script.
    Const SE_VPS_GUID = "{143F5698-103B-12D4-FF34-1F34767DEabc}"Const SE_VPS_NAME1 = "FireSlowAuthenticationEventAuthenticationDurationThresholdSeconds"Const SE_VPS_VALUE1 = 6Const SE_VPS_NAME2 = "FireSlowAuthenticationEventIntervalDurationMinutes"Const SE_VPS_VALUE2 = 5Const SE_VPS_NAME3 = "FireSlowAuthenticationEventAfterNumTimesInInterval"Const SE_VPS_VALUE3 = 20Sub SetValue()' Create the root obect.Dim root ' The FPCLib.FPC root objectSet root = CreateObject("FPC.Root")'Declare the other objects needed.Dim array ' An FPCArray objectDim VendorSets ' An FPCVendorParametersSets collectionDim VendorSet ' An FPCVendorParametersSet object' Get references to the array object' and the network rules collection.Set array = root.GetContainingArraySet VendorSets = array.VendorParametersSetsOn Error Resume NextSet VendorSet = VendorSets.Item( SE_VPS_GUID )If Err.Number <> 0 ThenErr.Clear' Add the itemSet VendorSet = VendorSets.Add( SE_VPS_GUID )CheckErrorWScript.Echo "New VendorSet added... " & VendorSet.NameElseWScript.Echo "Existing VendorSet found... current values: " & vbCrLf & _SE_VPS_NAME1 & " = " & VendorSet.Value(SE_VPS_NAME1) & vbCrLf & _SE_VPS_NAME2 & " = " & VendorSet.Value(SE_VPS_NAME2) & vbCrLf & _SE_VPS_NAME3 & " = " & VendorSet.Value(SE_VPS_NAME3)End IfVendorSet.Value(SE_VPS_NAME1) = SE_VPS_VALUE1If Err.Number <> 0 Then CheckErrorVendorSet.Value(SE_VPS_NAME2) = SE_VPS_VALUE2If Err.Number <> 0 Then CheckErrorVendorSet.Value(SE_VPS_NAME3) = SE_VPS_VALUE3If Err.Number <> 0 Then CheckErrorVendorSets.Save false, trueCheckErrorIf Err.Number = 0 ThenWScript.Echo "Done, saved!"End IfEnd SubSub CheckError()If Err.Number <> 0 ThenWScript.Echo "An error occurred: 0x" & Hex(Err.Number) & " " & Err.DescriptionErr.ClearEnd IfEnd SubSetValue
  2. Click Start, click Run, type cmd in the Open box, and then click OK.
  3. At the command prompt, run the following command:
    cscript path\configure_slow_authentication_alert.vbs
    Note Use the actual path of the Configure_slow_authentication_alert.vbs file to replace the path entry.

Id. de artículo: 952082 - Última revisión: 06/17/2008 21:11:25 - Revisión: 1.2

Microsoft Internet Security and Acceleration Server 2006 Enterprise Edition, Microsoft Internet Security and Acceleration Server 2006 Standard Edition

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