This chapter deals exclusively with the differences between Samba-3.0.20 and Samba-2.2.8a. It points out where configuration parameters have changed, and provides a simple guide for the move from 2.2.x to 3.0.20.
Samba-3.0.20 default behavior should be approximately the same as Samba-2.2.x. The default behavior when the new parameter passdb backend is not defined in the smb.conf file provides the same default behavior as Samba-2.2.x with encrypt passwords = Yes and will use the smbpasswd database.