IFWXNetConfigDetectionNotification interface

Applies to: desktop apps only

The IFWXNetConfigDetectionNotification interface includes a method for receiving a notification about a network configuration detection (NCD) event from the Microsoft Firewall service. An NCD event indicates that a change has been made to the network configuration. By registering for these events, an application filter can react appropriately to changes in network configuration. For example, if your application filter listens for Firewall service events on a particular network, you can use NCD events so that the filter can respond to changes to the network configuration, such as the addition of a network adapter. The filter can then be aware of where to listen for Firewall service events, even though the network configuration has changed. Note that notifications about changes in enterprise networks or enterprise network sets are not generated. For more information, see Using Network Configuration Detection.

For more information about NCD events, see the FwxNcdEvent structure, the FwxNcdEventType enumerated type, and the FwxNcdEventParameters union.

When to implement

An application filter that needs to receive notifications about NCD events from the Firewall service and handle these events must implement this notification interface.


The IFWXNetConfigDetectionNotification interface inherits from the IUnknown interface. IFWXNetConfigDetectionNotification also has these types of members:

  • Methods


The IFWXNetConfigDetectionNotification interface has these methods.

Method Description

Receives a notification from the Firewall service about a network configuration detection (NCD) event and handles the event. Application filters must implement this method to handle NCD events.



Minimum supported client

None supported

Minimum supported server

Windows Server 2008 R2, Windows Server 2008 with SP2 (64-bit only)


Forefront Threat Management Gateway (TMG) 2010



See also

Filter Interfaces



Build date: 7/12/2010