This is don't really follow or undestand, but its not relevant to
RadiusNT.
> Other IP addresses for the WinNT machine are 203.58.25.50, 203.58.25.201
> and 203.58.25.202
>
> The NAS is located at 203.58.25.100 and is configured to talk to the
> RadiusNT server at 203.58.25.3 .
No problems here.
> The NT machine receives the radius request fine and the ID is confirmed
> back to the NAS. This works for security only. When I try to use
> accounting, the NAS never acknowledges the ack sent by the RadiusNT machine.
Have you tried enabling the "Require secret" option for
accounting? This could be all you need for accounting
to work.
Dale