freeradius and machine account authentication

[Norbert Wegener]

>>Norbert Wegener <nw at sbs.de <http://lists.freeradius.org/mailman/listinfo/freeradius-users>> wrote:
>>/ FreeRADIUS at this time cannot perform machine account authentications,
/>>/ but it supports proxying them off to another RADIUS server (for example,
/>>/ IAS, or FUNK)
/>
>  After recent changes to both FreeRADIUS and Samba, this is now
> supported.  See the list archives for details.
>
>  Alan DeKok.
I searched the archives and found this or that discussion about that topic in general.
Nevertheless I did not find any hint on how to configure freeradius to perform machine
account authentication. Maybe someone has a pointer for me, as even in freeradius-snapshot-20051104 
a grep for machine account was not successfull.

Another question comes up in that context: What job has samba to solve here? Must the server,
that runs freeradius, be member of the active diretory domain and samba is used for this? 
Which version of samba must at least be used?

Thanks
Norbert Wegener