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WHATSNEW.txt |
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. While we welcome your interest in Samba 4, we don't want you to run your network with it quite yet. Please note the WARNINGS below, and the STATUS file, which aims to document what should and should not work. With 4 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), we felt that we should create something we could 'show off' to our users. This is a Technology Preview (TP), aimed at allowing you, our users, managers and developers to see how we have progressed, and to invite your feedback and support. WARNINGS ======== Samba4 TP is currently a pre-alpha technology. 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. As we research the needs of Active Directory integration more closely, we may need to change the format of the user database, in particular as we begin to understand how the attributes are generated and stored. At a worst case, we expect users will be able to extract the stored data as LDIF and hand munge it, but until we make an alpha release, we won't do this automatically. Indeed, many module changes are simply easier to cope with if you just re-provision after the upgrade. We value the security of your computers, and so we must warn you that Samba 4 Technology Preview includes basic Access Control List (ACL) protection on the main user database, but due to time constraints, none on the registry at this stage. We also do not currently have ACLs on the SWAT web-based management tool. This means that Samba 4 Technology Preview is not secure, and should not be exposed to untrusted networks. Within the above proviso, file system access should occur as the logged in user, much as Samba3 does. As such, we must strongly recommend against using Samba4 in a production environment at this stage. 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 Centre (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. SWAT is now integrated into Samba 4 as the user-friendly interface to Samba server management. SWAT provides easy access to our setup and migration tools. Using SWAT, you can migrate windows domains in Samba 4, allowing easy setup of initial user databases, and upgrades from Samba 3. The new VFS features in Samba 4 adapts the file-system 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 back-end. We are aiming for Samba 4 to be powerful front-end to large directories. CHANGES ======= Those familiar with Samba 3 can find a list of user-visible changes since that release series in the NEWS file. - An optional password is no longer supported as the second argument to smbclient. - The default location of smb.conf in non-FHS builds has changed from the PREFIX/lib directory to the PREFIX/etc directory. KNOWN ISSUES ============ - Standalone server and domain member roles are not currently supported. While we have much of the infrastructure required, we have not collected these pieces together. - There is no printing support in the current release. - SWAT can be painful with <TAB> and forms. Just use the mouse, as the JavaScript layer doing this will change. 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).