samba - May 1998 - Samba as a proxy ?

Hi all,

I have 2 networks (A & B), connected to a UNIX computer. I don't
wan't
the Unix computer to route paquets between network A and network B. My
PDC (NT) is on network A, and i have an exchange server on network B.
The exchange server need the account informations from the PDC.

   network A             network B
                     ____
   -----------------|____|-------------
       |                              |
     |__|           UNIX       |___|
                    (Proxy)
  NT - PDC                   NT - Exchange

Is there a way to use samba on the UNIX computer to act as a PDC on
network B and use account informations from the PDC on network A ?

 Thanks for you Help

 Sebastien -