1 What's new in Samba 4 alpha7
2 ============================
4 Samba 4 is the ambitious next version of the Samba suite that is being
5 developed in parallel to the stable 3.0 series. The main emphasis in
6 this branch is support for the Active Directory logon protocols used
7 by Windows 2000 and above.
9 Samba4 alpha7 follows on from the alpha release series we have been
10 publishing since September 2007
15 Samba4 alpha7 is not a final Samba release. That is more a reference
16 to Samba4's lack of the features we expect you will need than a
17 statement of code quality, but clearly it hasn't seen a broad
18 deployment yet. If you were to upgrade Samba3 (or indeed Windows) to
19 Samba4, you would find many things work, but that other key features
20 you may have relied on simply are not there yet.
22 For example, while Samba 3.0 is an excellent member of a Active
23 Directory domain, Samba4 is happier as a domain controller, and it is
24 in this role where it has seen deployment into production.
26 Samba4 is subjected to an awesome battery of tests on an
27 automated basis, we have found Samba4 to be very stable in it's
28 behaviour. We have to recommend against upgrading production servers
29 from Samba 3 to Samba 4 at this stage, because there may be the features on
30 which you may rely that are not present, or the mapping of
31 your configuration and user database may not be complete.
33 If you are upgrading, or looking to develop, test or deploy Samba4, you should
34 backup all configuration and data.
39 Samba4 supports the server-side of the Active Directory logon environment
40 used by Windows 2000 and later, so we can do full domain join
41 and domain logon operations with these clients.
43 Our Domain Controller (DC) implementation includes our own built-in
44 LDAP server and Kerberos Key Distribution Center (KDC) as well as the
45 Samba3-like logon services provided over CIFS. We correctly generate
46 the infamous Kerberos PAC, and include it with the Kerberos tickets we
49 The new VFS features in Samba 4 adapts the filesystem on the server to
50 match the Windows client semantics, allowing Samba 4 to better match
51 windows behaviour and application expectations. This includes file
52 annotation information (in streams) and NT ACLs in particular. The
53 VFS is backed with an extensive automated test suite.
55 A new scripting interface has been added to Samba 4, allowing
56 Python programs to interface to Samba's internals.
58 The Samba 4 architecture is based around an LDAP-like database that
59 can use a range of modular backends. One of the backends supports
60 standards compliant LDAP servers (including OpenLDAP), and we are
61 working on modules to map between AD-like behaviours and this backend.
62 We are aiming for Samba 4 to be powerful frontend to large
68 In the time since Samba4 alpha6 was released in Janurary 2009, Samba has
69 continued to evolve, but you may particularly notice these areas
70 (in no particular order):
72 Multi Master Replication (MMR) configuration can now be generated
73 for the OpenLDAP-Backend.
75 OpenLDAP-Online-Configuration (olc) can now be generated for the
76 OpenLDAP-Backend. (OpenLDAP-Versions >=2.4.15 required).
78 Support for Windows 7 beta as a member of the Samba4 domain
80 Issues with the nesting of LDB transactions have been fixed
82 A number of internal libraries (tevent, auth in particular has been
83 updated for easier use outside Samba4
85 spoolss IDL updates to bring Samba3 to use PIDL code, and to merge
86 the corrected IDL back into Samba4
88 Fixes to allow use of C++ compilers and to increase portability
90 Fixed TLS (SSL) support with modern versions of GnuTLS
92 These are just some of the highlights of the work done in the past
93 month. More details can be found in our GIT history.
99 Those familiar with Samba 3 can find a list of user-visible changes
100 since that release series in the NEWS file.
105 - Domain member support is in it's infancy, and is not comparable to
106 the support found in Samba3.
108 - There is no printing support in the current release.
110 - There is no NetBIOS browsing support in the current release
112 - The Samba4 port of the CTDB clustering support is not yet complete
114 - Clock Synchronisation is critical. Many 'wrong password' errors are
115 actually due to Kerberos objecting to a clock skew between client
116 and server. (The NTP work in the previous alphas are partly to assist
119 - Samba4 alpha7 is currently only portable to recent Linux
120 distributions. Work to return support for other Unix varients is
121 expected during the next alpha cycles
127 A short guide to setting up Samba 4 can be found in the howto.txt file
128 in root of the tarball.
130 DEVELOPMENT and FEEDBACK
131 ========================
132 Bugs can be filed at https://bugzilla.samba.org/ but please be aware
133 that many features are simply not expected to work at this stage.
135 The Samba Wiki at http://wiki.samba.org should detail some of these
138 Development and general discussion about Samba 4 happens mainly on
139 the #samba-technical IRC channel (on irc.freenode.net) and
140 the samba-technical mailing list (see http://lists.samba.org/ for