FreeBSD and Active Directory

[Chris Edwards]

I have been put in charge of creating a single sign-on mechanism for our
Windows 2003 and FreeBSD servers.  We are wanting to use Active Directory as
our LDAP server.  I know of four different methods that could possibly work.

1. OpenLDAP
2. Radius
3. NIS
4. WinBind / Samba

Which is the most excepted/supported way to do this?  Several of the severs
are very old, 4+ years old.

Thanks for any help,

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Chris Edwards