Goal: Configure Samba on a Linux server to authenticate users against
the Windows 2003 Server domain controller.

Linux server
------------
- Red Hat Enterprise Linux 5
- Samba 3.02325202
- Configuration via Webmin or Red Hat configs or command line
- Root access available

Windows Domain Controller
-------------------------
- Active Directory is active, if that matters
- LDAP service is available (Bugzilla on the Linux server is already
correctly authenticating via LDAP to the Windows server)

I have, so far, successfully configured Samba to serve up directories
that are read/writable by all guests or read-only by all guests.  I need
to configure shares that are writable by only one or a few users and
read-only to many others.  Such restrictions should be based on the
Windows domain controller user credentials.  (In fact, it would be great
to have all user credentials for access on the Linux server be from the
domain controller.)

I am wading through much documentation on the subject.  So far my
understanding is too weak to arrive at the result I want.  If anyone has
any help to share in this regard, I appreciate it.

Alan