What's new in Samba 4 alpha1 ============================ Samba 4 is the ambitious next version of the Samba suite that is being developed in parallel to the stable 3.0 series. The main emphasis in this branch is support for the Active Directory logon protocols used by Windows 2000 and above. Samba 4 is currently not yet in a state where it is usable in production environments. Note the WARNINGS below, and the STATUS file, which aims to document what should and should not work. Samba4 alpha1 is the culmination of 4.5 years of development under our belt since Tridge first proposed a new Virtual File System (VFS) layer for Samba3 (a project which eventually lead to our Active Directory efforts), and 1.5 years since we first released a Technology Preview, we wish to allow users, managers and developers to see how we have progressed, and to invite feedback and support. WARNINGS ======== Samba4 alpha1 is not a final Samba release. That is more a reference to Samba4's lack of the features we expect you will need than a statement of code quality, but clearly it hasn't seen a broad deployment yet. If you were to upgrade Samba3 (or indeed Windows) to Samba4, you would find many things work, but that other key features you may have relied on simply are not there yet. For example, while Samba 3.0 is an excellent member of a Active Directory domain, Samba4 is happier as a domain controller: (This is where we have done most of the research and development). While Samba4 is subjected to an awesome battery of tests on an automated basis, and we have found Samba4 to be very stable in it's behaviour, we have to recommend against upgrading production servers from Samba 3 to Samba 4 at this stage. If you are upgrading an experimental server, or looking to develop and test Samba, you should backup all configuration and data. NEW FEATURES ============ Samba4 supports the server-side of the Active Directory logon environment used by Windows 2000 and later, so we can do full domain join and domain logon operations with these clients. Our Domain Controller (DC) implementation includes our own built-in LDAP server and Kerberos Key Distribution Center (KDC) as well as the Samba3-like logon services provided over CIFS. We correctly generate the infamous Kerberos PAC, and include it with the Kerberos tickets we issue. The new VFS features in Samba 4 adapts the filesystem on the server to match the Windows client semantics, allowing Samba 4 to better match windows behaviour and application expectations. This includes file annotation information (in streams) and NT ACLs in particular. The VFS is backed with an extensive automated test suite. A new scripting interface has been added to Samba 4, allowing JavaScript programs to interface to Samba's internals. The Samba 4 architecture is based around an LDAP-like database that can use a range of modular backends. One of the backends supports standards compliant LDAP servers (including OpenLDAP), and we are working on modules to map between AD-like behaviours and this backend. We are aiming for Samba 4 to be powerful frontend to large directories. CHANGES SINCE TP5 ================= In the time since TP5 was released in June 2007, Samba has continued to evolve, but you may particularly notice these areas: Group Policy Support: Basic group policies may be defined, and are enforced by Windows clients MMC Support: The Active Directory Users and Computers console now works, supporting most operations. Winbind: Kai Blin has been working hard on his Google Summer of Code project, creating a winbind implementation for Samba4. Heimdal update: A Heimdal 1.0 snapshot is now included as the internal Kerberos library in Samba4. In the past few weeks, many small but significant bugs have been fixed, particularly thanks to Matthias Dieter Wallnöfer These are just some of the highlights of the work done in the past few months. More details can be found in our SVN history. CHANGES ======= Those familiar with Samba 3 can find a list of user-visible changes since that release series in the NEWS file. KNOWN ISSUES ============ - Domain member support is in it's infancy, and is not comprable to the support found in Samba3. - There is no printing support in the current release. - Support for managing groups is currently poor (as the memberOf/member linked attributes are not kept in sync). - Renaming and deleting subtrees (containers) in the the LDB tree will have unexpected results. - The Samba4 port of the CTDB clustering support is not yet complete RUNNING Samba4 ============== A short guide to setting up Samba 4 can be found in the howto.txt file in root of the tarball. DEVELOPMENT and FEEDBACK ======================== Bugs can be filed at https://bugzilla.samba.org/. Please look at the STATUS file before filing a bug to see if a particular is supposed to work yet. Development and general discussion about Samba 4 happens mainly on the #samba-technical IRC channel (on irc.freenode.net) and the samba-technical mailing list (see http://lists.samba.org/ for details).