path: root/WHATSNEW.txt

                  WHATS NEW IN Samba 3.0.0 beta1
                           June 7 2003
                  ==============================

This is a beta release of Samba 3.0.0. This is a non-production release 
intended for testing purposes.  Use at your own risk. 

The purpose of this beta release is to get wider testing of the major
new pieces of code in the current Samba 3.0 development tree. We have
officially ceased development on the 2.2.x release of Samba and are
concentrating on Samba 3.0. To reduce the time before the final 
Samba 3.0 release we need as many people as possible to start testing 
these beta releases, and to provide high quality feedback on what 
needs fixing.

Samba 3.0 is feature complete. However there is still some final 
work to be done on certain pieces of functionality.  Please refer to 
the section on "Known Issues" for more details.


Major new features:
-------------------

1)  Active Directory support. This release is able to join a ADS realm
    as a member server and authenticate users using LDAP/kerberos.

2)  Unicode support. Samba will now negotiate UNICODE on the wire and
    internally there is now a much better infrastructure for multi-byte
    and UNICODE character sets.

3)  New authentication system. The internal authentication system has
    been almost completely rewritten. Most of the changes are internal,
    but the new auth system is also very configurable.

4)  New filename mangling system. The filename mangling system has been
    completely rewritten. An internal database now stores mangling maps
    persistently. This needs lots of testing.

5)  New "net" command. A new "net" command has been added. It is
    somewhat similar to the "net" command in windows. Eventually we 
    plan to replace a bunch of other utilities (such as smbpasswd) 
    with subcommands in "net", at the moment only a few things are
    implemented.

6)  Samba now negotiates NT-style status32 codes on the wire. This
    improves error handling a lot.

7)  Better Windows 2000/XP/2003 printing support including publishing 
    printer attributes in active directory

8)  New loadable RPC modules

9)  New dual-daemon winbindd support (-B) for better performance

10) Support for migrating from a Windows NT 4.0 domain to a Samba 
    domain and maintaining user, group and domain SIDs

11) Support for establishing trust relationships with Windows NT 4.0
    domain controllers
  
12) Initial support for a distributed Winbind architecture using
    an LDAP directory for storing SID to uid/gid mappings
  
13) Major updates to the Samba documentation tree.

Plus lots of other improvements!


Additional Documentation
------------------------

Please refer to Samba documentation tree (including in the docs/ 
subdirectory) for extensive explanations of installing, configuring
and maintaining Samba 3.0 servers and clients.  It is advised to 
begin with the Samba-HOWTO-Collection for overviews and specific 
tasks (the current book is up to approximately 400 pages) and to 
refer to the various man pages for information on individual options.


######################################################################
Upgrading from Samba 2.2
########################

This section is provided to help administrators understand the details
involved with upgrading a Samba 2.2 server to Samba 3.0


Building
--------

Many of the options to the GNU autoconf script have been modified 
in the 3.0 release.  The most noticeable are

  * removal of --with-tdbsam (is now included by default; see section
    on passdb backends and authentication for more details)
    
  * --with-ldapsam is now on used to provided backward compatible
    parameters for LDAP enabled Samba 2.2 servers.  Refer to the passdb 
    backend and authentication section for more details
  
  * inclusion of non-standard passdb modules may be enabled using
    --with-expsam.  This includes an XML backend, a mysql backend,
    and a NIS backend.
      
  * removal of --with-msdfs (is now enabled by default)
  
  * removal of --with-ssl (no longer supported)
  
  * --with-utmp now defaults to 'yes' on supported systems
  
  * --with-sendfile-support is now enabled by default on supported 
    systems
  
    
Parameters
----------

This section contains a brief listing of changes to smb.conf options
in the 3.0.0 release.  Please refer to the smb.conf(5) man page for
complete descriptions of new or modified parameters.

Removed Parameters (order alphabetically):

  * admin log
  * alternate permissions
  * character set
  * client codepage
  * code page directory
  * coding system
  * domain admin group
  * domain guest group
  * force unknown acl user
  * nt smb support
  * post script
  * printer driver
  * printer driver file
  * printer driver location
  * status
  * total print jobs
  * use rhosts
  * valid chars
  * vfs options

New Parameters (new parameters have been grouped by function):

  Remote management
  -----------------
  * abort shutdown script
  * shutdown script

  User and Group Account Management
  ---------------------------------
  * add group script
  * add machine script
  * add user to group script
  * algorithmic rid base
  * delete group script
  * delete user from group script
  * passdb backend
  * set primary group script

  Authentication
  --------------
  * auth methods
  * ads server
  * realm

  Protocol Options
  ----------------
  * client lanman auth
  * client NTLMv2 auth
  * client schannel
  * client signing
  * client use spnego
  * disable netbios
  * ntlm auth
  * paranoid server security
  * server schannel
  * smb ports
  * use spnego

  File Service
  ------------
  * get quota command
  * hide special files
  * hide unwriteable files
  * hostname lookups
  * kernel change notify
  * mangle prefix
  * msdfs proxy
  * set quota command
  * use sendfile
  * vfs objects
  
  Printing
  --------
  * max reported print jobs

  UNICODE and Character Sets
  --------------------------
  * display charset
  * dos charset
  * unicode
  * unix charset
  
  SID to uid/gid Mappings
  -----------------------
  * idmap backend
  * idmap gid
  * idmap only
  * idmap uid

  LDAP
  ----
  * ldap delete dn
  * ldap group suffix
  * ldap idmap suffix
  * ldap machine suffix
  * ldap passwd sync
  * ldap trust ids
  * ldap user suffix
  
  General Configuration
  ---------------------
  * preload modules
  * privatedir

Modified Parameters (changes in behavior):

  * encrypt passwords (enabled by default)
  * mangling method (set to 'hash2' by default)
  * passwd chat
  * passwd program
  * restrict anonymous (integer value)
  * security (new 'ads' value)
  * strict locking (enabled by default)
  * winbind cache time (increased to 5 minutes)
  * winbind uid (deprecated in favor of 'idmap uid')
  * winbind gid (deprecated in favor of 'idmap gid')


Databases
---------

This section contains brief descriptions of any new databases 
introduced in Samba 3.0.  Please remember to backup your existing 
${lock directory}/*tdb before upgrading to Samba 3.0.  Samba will 
upgrade databases as they are opened (if necessary), but downgrading 
from 3.0 to 2.2 is an unsupported path.

Name		Description				Backup?
----		-----------				-------
account_policy	User policy settings			yes
gencache	Generic caching db			no
group_mapping	Mapping table from Windows		yes
		groups/SID to unix groups	
idmap		new ID map table from SIDS		yes
		to UNIX uids/gids.
namecache	Name resolution cache entries		no
netlogon_unigrp	Cache of universal group 		no
		membership obtained when 
		operating as a member of a 
		Windows domain
printing/*.tdb	Cached output from 'lpq 		no
		command' created on a per print 
		service basis
registry	Read-only samba registry skeleton	no
		that provides support for exporting
		various db tables via the winreg RPCs


Changes in Behavior
-------------------

The following issues are known changes in behavior between Samba 2.2 and 
Samba 3.0 that may affect certain installations of Samba.

  1)  When operating as a member of a Windows domain, Samba 2.2 would 
      map any users authenticated by the remote DC to the 'guest account'
      if a uid could not be obtained via the getpwnam() call.  Samba 3.0
      rejects the connection as NT_STATUS_LOGON_FAILURE.  There is no 
      current work around to re-establish the 2.2 behavior.
      
  2)  When adding machines to a Samba 2.2 controlled domain, the 
      'add user script' was used to create the UNIX identity of the 
      machine trust account.  Samba 3.0 introduces a new 'add machine 
      script' that must be specified for this purpose.  Samba 3.0 will
      not fall back to using the 'add user script' in the absence of 
      an 'add machine script'
  

######################################################################
Passdb Backends and Authentication
##################################

There have been a few new changes that Samba administrators should be
aware of when moving to Samba 3.0.

  1) encrypted passwords have been enabled by default in order to 
     inter-operate better with out-of-the-box Windows client 
     installations.  This does mean that either (a) a samba account
     must be created for each user, or (b) 'encrypt passwords = no'
     must be explicitly defined in smb.conf.
    
  2) Inclusion of new 'security = ads' option for integration 
     with an Active Directory domain using the native Windows
     Kerberos 5 and LDAP protocols.

Samba 3.0 also includes the possibility of setting up chains
of authentication methods (auth methods) and account storage 
backends (passdb backend).  Please refer to the smb.conf(5) 
man page for details.  While both parameters assume sane default 
values, it is likely that you will need to understand what the 
values actually mean in order to ensure Samba operates correctly.

The recommended passdb backends at this time are

  * smbpasswd - 2.2 compatible flat file format
  * tdbsam - attribute rich database intended as an smbpasswd
    replacement for stand alone servers
  * ldapsam - attribute rich account storage and retrieval 
    backend utilizing an LDAP directory.  
  * ldapsam_compat - a 2.2 backward compatible LDAP account 
    backend
    
Certain functions of the smbpasswd(8) tool have been split between the 
new smbpasswd(8) utility, the net(8) tool, and the new pdbedit(8) 
utility.  See the respective man pages for details.
    
     
######################################################################
LDAP
####

This section outlines the new features affecting Samba / LDAP integration.

New Schema
----------
  
A new object class (sambaSamAccount) has been introduced to replace 
the old sambaAccount.  This change aids us in the renaming of attributes 
to prevent clashes with attributes from other vendors.  There is a 
conversion script (examples/LDAP/convertSambaAccount) to modify and LDIF 
file to the new schema.
  
Example:
  
	$ ldapsearch .... -b "ou=people,dc=..." > old.ldif
	$ convertSambaAccount <DOM SID> old.ldif new.ldif
	
The <DOM SID> can be obtained by running 'net getlocalsid <DOMAINNAME>' 
on the Samba PDC as root.
    
The old sambaAccount schema may still be used by specifying the 
"ldapsam_compat" passdb backend.  However, the sambaAccount and
associated attributes have been moved to the historical section of
the schema file and must be uncommented before use if needed.
The 2.2 object class declaration for a sambaAccount has not changed
in the 3.0 samba.schema file. 
  
Other new object classes and their uses include:
  
  * sambaDomain - domain information used to allocate rids 
    for users and groups as necessary.  The attributes are added
    in 'ldap suffix' directory entry automatically if 
    an idmap uid/gid range has been set and the 'ldapsam'
    passdb backend has been selected.
      
  * sambaGroupMapping - an object representing the 
    relationship between a posixGroup and a Windows
    group/SID.  These entries are stored in the 'ldap 
    group suffix' and managed by the 'net groupmap' command.
    
  * sambaUnixIdPool - created in the 'ldap idmap suffix' entry 
    automatically and contains the next available 'idmap uid' and 
    'idmap gid'
    
  * sambaIdmapEntry - object storing a mapping between a 
    SID and a UNIX uid/gid.  These objects are created by the 
    idmap_ldap module as needed.

    
New Suffix for Searching
------------------------
  
The following new smb.conf parameters have been added to aid in directing
certain LDAP queries when 'passdb backend = ldapsam://...' has been
specified.

  * ldap suffix         - used to search for user and computer accounts
  * ldap user suffix     - used to store user accounts
  * ldap machine suffix - used to store machine trust accounts
  * ldap group suffix   - location of posixGroup/sambaGroupMapping entries
  * ldap idmap suffix   - location of sambaIdmapEntry objects

In an 'ldap suffix' is defined, it will be appended to all of the 
remaining sub-suffix parameters.  In this case, the order of the suffix
listings in smb.conf is important.  Always place the 'ldap suffix' first
in the list.  

Due to a limitation in Samba's smb.conf parsing, you should not surround 
the DN's with quotation marks.


IdMap LDAP support
------------------

Samba 3.0 supports an ldap backend for the idmap subsystem.  The 
following options would inform Samba that the idmap table should be
stored on the directory server onterose in the "ou=idmap,dc=plainjoe,
dc=org" partition.

 [global]
    ...
    idmap backend     = ldap:ldap://onterose/
    ldap idmap suffix = ou=idmap,dc=plainjoe,dc=org
    idmap uid         = 40000-50000
    idmap gid         = 40000-50000

This configuration allows winbind installations on multiple servers to
share a uid/gid number space, thus avoiding the interoperability problems
with NFS that were present in Samba 2.2.
    

######################################################################
Known Issues
############

* One such limitation that is worth mentioning (and will be corrected 
  before the actual stable 3.0.0 release is the dead lock problem with
  running winbindd on a Samba PDC in order to allocate uids and gids for 
  users and groups in a trusted domain.  When the Samba domain is acting 
  as the trusted domain to a Windows NT 4.0 domain, there are no known 
  issues.

* The smbldap perl script for managing user entries in an LDAP 
  directory have not be updated to function with the Samba 3.0
  schema changes.  This (or an equivalent solution) work is planned
  to be completed prior to the stable 3.0.0 release.

Please refer to https://bugzilla.samba.org/ for a current list of bugs 
filed against the Samba 3.0 codebase.


######################################################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical IRC channel on irc.freenode.net.

If you do report problems then please try to send high quality
feedback. If you don't provide vital information to help us track down
the problem then you will probably be ignored.  

A new bugzilla installation has been established to help support the 
Samba 3.0 community of users.  This server, located at 
https://bugzilla.samba.org/, will replace the existing jitterbug server 
and the old http://bugs.samba.org now points to the new bugzilla server.