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authorGerald Carter <jerry@samba.org>2003-07-16 03:51:25 +0000
committerGerald Carter <jerry@samba.org>2003-07-16 03:51:25 +0000
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updating WHATSNEW
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-## Date : 2003-07-09
-## Author: Gerald (Jerry) Carter <jerry@samba.org>
-## Title: README.idmap-and-winbind-changes
-
-Introduction
-------------
-
-Beginning with Samba3.0.0beta3, winbindd has been given new account
-manage functionality equivalent to the 'add user script' family of
-smb.conf parameters. The idmap design has also been changed to centralize
-control of foreign SID lookups and matching to UNIX uids and gids.
-
-
-Brief Description of Changes
-----------------------------
-
-1) The sid_to_uid() family of functions (smbd/uid.c) have been reverted
- to the 2.2.x design. This means that when resolving a SID to a UID
- or similar mapping:
-
- a) First consult winbindd
- b) perform a local lookup only if winbindd fails to
- return a successful answer
-
- There are some variations to this, but these two rules generally
- apply.
-
-2) All idmap lookups have been moved into winbindd. This means that
- a server must run winbindd (and support NSS) in order to achieve
- any mappings of SID to dynamically allocated UNIX ids. This was
- a conscious design choice.
-
-3) New functions have been added to winbindd to emulate the 'add user script'
- family of smbd functions without requiring that external scripts
- be defined. This functionality is controlled by the 'winbind enable local
- accounts' smb.conf parameter (enabled by default).
-
- However, this account management functionality is only supported in
- a local tdb (winbindd_idmap.tdb). If these new UNIX accounts must be
- shared among multiple Samba servers (such as a PDC and BDCs), it
- will be necessary to define your own 'add user script', et. al.
- programs that place the accounts/groups in some form of directory
- such as NIS or LDAP. This requirement was deemed beyond the scope
- of winbind's account management functions. Solutions for distributing
- UNIX system information have been deployed and tested for many years.
- We saw no need to reinvent the wheel.
-
-4) A member of a Samba controlled domain running winbindd is now able to
- map domain users directly onto existing UNIX accounts while still
- automatically creating accounts for trusted users and groups. This
- behavior is controlled by the 'winbind trusted domains only' smb.conf
- parameter (disabled by default to provide 2.2.x winbind behavior).
-
-5) Group mapping support is wrapped in the local_XX_to_XX() functions
- in smbd/uid.c. The reason that group mappings are not included
- in winbindd is because the purpose of Samba's group map is to
- match any Windows SID with an existing UNIX group. These UNIX
- groups can be created by winbindd (see next section), but the
- SID<->gid mapping is retreived by smbd, not winbindd.
-
-
-Examples
---------
-
-* security = server running winbindd to allocate accounts on demand
-
-* Samba PDC running winbindd to handle the automatic creation of UNIX
- identities for machine trust accounts
-
-* Automtically creating UNIX user and groups when migrating a Windows NT
- 4.0 PDC to a Samba PDC. Winbindd must be running when executing
- 'net rpc vampire' for this to work.
-