I've written a brief howto document on setting up the Samba 3.0 alpha code with kerberos authentication against a Win2000 KDC (ie. active directory). It covers how to setup both smbclient and smbd. http://samba.org/ftp/tridge/kerberos/HOWTO Only try this if you like bleeding edge code. This is not ready for production use yet. Cheers, Tridge