CreateRadiusAuthenticator Method of the IFWXFirewall2 Interface

The CreateRadiusAuthenticator method creates a RADIUS authenticator interface (IFWXRadiusAuthenticator), which can be used to authenticate RADIUS users.


HRESULT CreateRadiusAuthenticator(
  [out]  IFWXRadiusAuthenticator** ppIFWXRadiusAuthenticator



Address of an interface pointer that on return points to the new IFWXRadiusAuthenticator interface created.

Return Value

This method returns S_OK if the call is successful; otherwise, it returns an error code.


An application filter can use the IFWXFirewall2::CreateRadiusAuthenticator method to get the IFWXRadiusAuthenticator interface. When a request is received on a listener that has RADIUS authentication enabled, and the application filter needs to perform RADIUS authentication, it calls IFWXRadiusAuthenticator::AuthenticateRadiusUser and gives it a pointer to its IFWXAuthenticationCompletion callback.

A component that has to perform RADIUS authentication should first call this method to obtain a RADIUS authenticator interface from the Microsoft Firewall service. Then the component can use this interface to perform RADIUS authentication, by invoking its IFWXRadiusAuthenticator::AuthenticateRadiusUser method. The component can keep a single instance of the interface and repeatedly invoke its IFWXRadiusAuthenticator::AuthenticateRadiusUser method for each user that requires authentication. When the component no longer needs to perform RADIUS authentication, it can release the IFWXRadiusAuthenticator interface.


Server Requires Windows Server 2008.
Version Requires Forefront Threat Management Gateway (TMG).

Declared in Wspfwext.idl.


Requires Wspsrv.exe.

See Also


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Build date: 11/30/2009

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