Release Announcements ===================== This is the first preview release of Samba 4.7. This is *not* intended for production environments and is designed for testing purposes only. Please report any defects via the Samba bug reporting system at https://bugzilla.samba.org/. Samba 4.7 will be the next version of the Samba suite. UPGRADING ========= smbclient changes ----------------- smbclient no longer prints a 'Domain=[...] OS=[Windows 6.1] Server=[...]' banner when connecting to the first server. With SMB2 and Kerberos there's no way to print this information reliable. Now we avoid it at all consistently. In interactive session the following banner is now presented to the user: 'Try "help" do get a list of possible commands.'. The default for "client max protocol" has changed to "SMB3_11", which means that smbclient (and related commands) will work against servers without SMB1 support. It's possible to use the '-m/--max-protocol' option to overwrite the "client max protocol" option temporary. Note that the '-e/--encrypt' option also works with most SMB3 servers (e.g. Windows >= 2012 and Samba >= 4.0.0), so the SMB1 unix extensions are not required for encryption. The change to SMB3_11 as default also means smbclient no longer negotiates SMB1 unix extensions by default, when talking to a Samba server with "unix extensions = yes". As a result some commands are not available, e.g. posix_encrypt, posix_open, posix_mkdir, posix_rmdir, posix_unlink, posix_whoami, getfacl and symlink. Using "-mNT1" reenabled them, if the server supports SMB1. Note the default ("CORE") for "client min protocol" hasn't changed, so it's still possible to connect to SMB1-only servers by default. NEW FEATURES/CHANGES ==================== Samba AD with MIT Kerberos -------------------------- After four years of development, Samba finally supports compiling and running Samba AD with MIT Kerberos. You can enable it with: ./configure --with-system-mitkrb5 Samba requires version 1.15.1 of MIT Kerberos to build with AD DC support. The krb5-devel and krb5-server packages are required. The feature set is not on par with with the Heimdal build but the most important things, like forest and external trusts, are working. Samba uses the KDC binary provided by MIT Kerberos. Missing features, compared to Heimdal, are: * PKINIT support * S4U2SELF/S4U2PROXY support * RODC support (not fully working with Heimdal either) The Samba AD process will take care of starting the MIT KDC and it will load a KDB (Kerberos Database) driver to access the Samba AD database. When provisioning an AD DC using 'samba-tool' it will take care of creating a correct kdc.conf file for the MIT KDC. Note that 'samba-tool' will overwrite the system kdc.conf by default. It is possible to use a different location during provision. You should consult the 'samba-tool' help and smb.conf manpage for details. Dynamic RPC port range ---------------------- The dynamic port range for RPC services has been changed from the old default value 1024-1300 to 49152-65535. This port range is not only used by a Samba AD DC but also applies to all other server roles including NT4-style domain controllers. The new value has been defined by Microsoft in Windows Server 2008 and newer versions. To make it easier for Administrators to control those port ranges we use the same default and make it configurable with the option: 'rpc server dynamic port range'. The 'rpc server port' option sets the first available port from the new 'rpc server dynamic port range' option. The option 'rpc server port' only applies to Samba provisioned as an AD DC. Authentication and Authorization audit support ---------------------------------------------- Detailed authentication and authorization audit information is now logged to Samba's debug logs under the "auth_audit" debug class, including in particular the client IP address triggering the audit line. Additionally, if Samba is compiled against the jansson JSON library, a JSON representation is logged under the "auth_json_audit" debug class. Audit support is comprehensive for all authentication and authorisation of user accounts in the Samba Active Directory Domain Controller, as well as the implicit authentication in password changes. In the file server and classic/NT4 domain controller, NTLM authentication, SMB and RPC authorization is covered, however password changes are not at this stage, and this support is not currently backed by a testsuite. Query record for open file or directory --------------------------------------- The record attached to an open file or directory in Samba can be queried through the 'net tdb locking' command. In clustered Samba this can be useful to determine the file or directory triggering corresponding "hot" record warnings in ctdb. Removal of lpcfg_register_defaults_hook() ----------------------------------------- The undocumented and unsupported function lpcfg_register_defaults_hook() that was used by external projects to call into Samba and modify smb.conf default parameter settings has been removed. If your project was using this call please raise the issue on samba-technical@lists.samba.org in order to design a supported way of obtaining the same functionality. Change of loadable module interface ----------------------------------- The _init function of all loadable modules in Samba has changed from: NTSTATUS _init(void); to: NTSTATUS _init(TALLOC_CTX *); This allows a program loading a module to pass in a long-lived talloc context (which must be guaranteed to be alive for the lifetime of the module). This allows modules to avoid use of the talloc_autofree_context() (which is inherently thread-unsafe) and still be valgrind-clean on exit. Modules that don't need to free long-lived data on exist should use the NULL talloc context. Parameter changes ----------------- The "strict sync" global parameter has been changed from a default of "no" to "yes". This means smbd will by default obey client requests to synchronize unwritten data in operating system buffers safely onto disk. This is a safer default setting for modern SMB1/2/3 clients. smb.conf changes ================ Parameter Name Description Default -------------- ----------- ------- allow unsafe cluster upgrade New parameter no auth event notification New parameter no auth methods Deprecated client max protocol Effective SMB3_11 default changed map untrusted to domain New value/ auto Default changed/ Deprecated mit kdc command New parameter profile acls Deprecated rpc server dynamic port range New parameter 49152-65535 strict sync Default changed yes KNOWN ISSUES ============ https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.7#Release_blocking_bugs ####################################### 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. All bug reports should be filed under the Samba 4.1 and newer product in the project's Bugzilla database (https://bugzilla.samba.org/). ====================================================================== == Our Code, Our Bugs, Our Responsibility. == The Samba Team ======================================================================