Microsoft Internet Security and Acceleration Server 2000


This interface allows a filter to modify the result of remote gethostbyname or gethostbyaddr calls made by a Firewall client.

Methods in Vtable Order

IUnknown Methods Description
QueryInterface Returns pointers to supported interfaces.
AddRef Increments the reference count.
Release Decrements the reference count.

IFWXGetXByY Methods Description
Deny Denies the name-resolution request.
SetResult Sets the hostent structure that will be returned.


This interface is implemented by the Firewall service.


The IFWXGetXByY interface essentially overrides the gethostbyname or gethostbyaddr functions, returning a hostent structure with different contents than would have been returned by the unfiltered calls. The filter has to call this interface from within IFWXSessionFilter::FirewallEventHandler.

A typical use of this interface would be to return an IP address other than that requested by the client; that is, to redirect the request.


  Windows NT/2000: Requires Windows 2000.
  Version: Requires ISA Server 2000.
  Header: Wspfwext.idl.