SSLAcceleratorPort Property of the IFPCWebListenerProperties2 Interface

The SSLAcceleratorPort property gets or sets the Secure Sockets Layer (SSL) accelerator port for the Web listener.

HRESULT put_SSLAcceleratorPort(
	long lSSLAcceleratorPort
HRESULT get_SSLAcceleratorPort(
	long* plSSLAcceleratorPort



Pointer to a variable that on return receives a 32-bit integer specifying the SSL accelerator port for the Web listener.


A 32-bit integer that specifies the SSL accelerator port for the Web listener.

Return Value

These property methods return S_OK if the call is successful; otherwise, they return an error code.

[Visual Basic]
Property SSLAcceleratorPort As Long

Property Value

A 32-bit integer that specifies the SSL accelerator port for the Web listener.

Example Code

This VBScript script retrieves the current value of the SSLAcceleratorPort property for the user-specified Web listener in the local array and asks the user whether the current value should be changed. The script changes the value of the SSLAcceleratorPort property to the value supplied by the user and then ensures that the SSLPort property is set to 0 if the SSLAcceleratorPort property is not set to zero.
Option Explicit
'Define the constant needed
const Error_FileNotFound = &H80070002
Sub Main(args)
	If(args.Count = 1) Then
		SetSslAcceleratorPort args(0)
	End If
End Sub
Sub SetSslAcceleratorPort(wlName)
	' Create the root object.
	Dim root  ' The FPCLib.FPC root object
	Set root = CreateObject("FPC.Root")
	' Declare the other objects needed.
	Dim isaArray		' An FPCArray object
	Dim webListener	 ' An FPCWebListener object
	Dim text			' A String
	Dim input		 ' A String
	' Get a reference to the local array object.
	Set isaArray = root.GetContainingArray()
	' Get a reference to the Web listener specified.
	On Error Resume Next
	Set webListener = isaArray.RuleElements.WebListeners.Item(wlName)
	If Err.Number = Error_FileNotFound Then
		WScript.Echo "The Web listener specified could not be found."
		On Error GoTo 0
		With webListener.Properties
			If .SSLAcceleratorPort = 0 Then
				text = "No SSL accelerator port is configured." & VbCrLf _
					 & "You can enter a nonzero value to enable" & VbCrLf _
					 & "an SSL accelerator port."
				text = "Current SSL accelerator port: " & .SSLAcceleratorPort _
					 & VbCrLf _
					 & "You can change this value, or enter 0" & VbCrLf _
					 & "to disable the SSL accelerator port."
			End If
			input = InputBox(text,"SSL Accelerator Port", "443")
		End With
		If CInt(input) <> webListener.Properties.SSLAcceleratorPort Then
			WScript.Echo "Changing the SSL accelerator port to " & CInt(input) _
						 & "..."
			webListener.Properties.SSLAcceleratorPort = CInt(input)
		End If
		If webListener.Properties.SSLAcceleratorPort <> 0 Then
			WScript.Echo "Ensuring that the SSL port is set to 0..."
			webListener.Properties.SSLPort = 0
		End If
	End If
End Sub
Sub Usage()
	WScript.Echo "Usage:" & VbCrLf _
		& "  CScript " & WScript.ScriptName & " WebListener" & VbCrLf _
		& "" & VbCrLf _
		& "	WebListener - Name of the Web listener" 
End Sub


This property is read/write. Its default value is 0, which indicates that no SSL accelerator is used, and its range of permissible values is from 0 through 65,535.

When the Forefront TMG computer sits behind an external SSL accelerator that receives HTTPS requests sent over the Internet from clients, the SSL accelerator terminates the SSL connections initiated by these clients and forwards their requests as HTTP requests to the port configured for sending HTTP requests on the Forefront TMG computer, which then forwards the requests to the published server if the traffic is allowed. If the Forefront TMG computer needs to generate links to itself when it performs link translation or redirects clients to authentication forms, Forefront TMG uses this property and the FQDN of the SSL accelerator from the Host header in the request to format such links with the HTTPS protocol. For example, if this property is set to 4443 and the FQDN from the Host header in the request is, the URL will have the form If this property is set to 443, Forefront TMG will not include the port number in the URL.

If this property is not set to 0, the SSLPort property of the Web listener must be set to 0 to prevent the Web listener from listening for direct SSL (HTTPS) connections from the Internet. If the SSLPort property is not set to 0, Forefront TMG will use the port specified in the SSLPort property for link translation.

This property cannot be accessed through Forefront TMG Management.


Client Requires Windows Vista or Windows XP.
Server Requires Windows Server 2008.
Version Requires Forefront Threat Management Gateway (TMG).

Declared in Msfpccom.idl.


Requires Msfpccom.dll.

See Also


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Build date: 11/30/2009

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