• [Announce] Samba 4.5.0rc1 Available for Download

    From Stefan Metzmacher@21:1/5 to All on Thu Jul 28 15:30:02 2016
    XPost: linux.samba

    Release Announcements

    This is the first preview release of Samba 4.5. 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 4.5 will be the next version of the Samba suite.


    NTLMv1 authentication disabled by default -----------------------------------------

    In order to improve security we have changed
    the default value for the "ntlm auth" option from
    "yes" to "no". This may have impact on very old
    client which doesn't support NTLMv2 yet.

    The primary user of NTLMv1 is MSCHAPv2 for VPNs and 802.1x.

    By default Samba will only allow NTLMv2 via NTLMSSP now,
    as we have the following default "lanman auth = no",
    "ntlm auth = no" and "raw NTLMv2 auth = no".


    Support for LDAP_SERVER_NOTIFICATION_OID ----------------------------------------

    The ldap server has support for the LDAP_SERVER_NOTIFICATION_OID
    control. This can be used to monitor the active directory database
    for changes.

    KCC improvements for sparse network replication -----------------------------------------------

    The Samba KCC will now be the default knowledge consistency checker in
    Samba AD. Instead of using full mesh replication between every DC, the
    KCC will set up connections to optimize replication latency and cost
    (using site links to calculate the routes). This change should allow
    larger domains to function significantly better in terms of replication
    traffic and the time spent performing DRS replication.

    VLV - Virtual List View

    The VLV Control allows applications to page the LDAP directory in the
    way you might expect a live phone book application to operate, without
    first downloading the entire directory.

    DRS Replication for the AD DC

    DRS Replication in Samba 4.5 is now much more efficient in handling
    linked attributes, particularly in large domains with over 1000 group memberships or other links.

    Replication is also much more reliable in the handling of tree
    renames, such as the rename of an organizational unit containing many
    users. Extensive tests have been added to ensure this code remains
    reliable, particularly in the case of conflicts between objects added
    with the same name on different servers.

    Schema updates are also handled much more reliably.

    samba-tool drs replicate with new options -----------------------------------------

    samba-tool drs replicate got two new options:

    The option '--local-online' will do the DsReplicaSync() via IRPC
    to the local dreplsrv service.

    The option '--async-op' will add DRSUAPI_DRS_ASYNC_OP to the
    DsReplicaSync(), which won't wait for the replication result.

    replPropertyMetaData Changes

    During the development of the DRS replication, tests showed that Samba
    stores the replPropertyMetaData object incorrectly. To address this,
    be aware that dbcheck will now detect and offer to fix all objects in
    the domain for this error.

    Linked attributes on deleted objects

    In Active Directory, an object that has been tombstoned or recycled
    has no linked attributes. However, Samba incorrectly maintained such
    links, slowing replication and run-time performance. dbcheck now
    offers to remove such links, and they are no longer kept after the
    object is tombstoned or recycled.

    Improved AD DC performance

    Many other improvements have been made to our LDAP database layer in
    the AD DC, to improve performance, both during samba-tool domain
    provision and at runtime.

    Other dbcheck improvements

    - samba-tool dbcheck can now find and fix a missing or corrupted
    'deleted objects' container.
    - BUG 11433: samba-dbcheck no longer offers to resort auxiliary class values
    in objectClass as these were then re-sorted at the next dbcheck indefinitely.

    Tombstone Reanimation

    Samba now supports tombstone reanimation, a feature in the AD DC
    allowing tombstones, that is objects which have been deleted, to be
    restored with the original SID and GUID still in place.

    Multiple DNS Forwarders on the AD DC

    Multiple DNS forwarders are now supported on the AD DC, allowing
    samba to fall back between two different DNS servers for forwarded queries.

    Password quality plugin support in the AD DC --------------------------------------------

    The check password script now operates correctly in the AD DC (this
    was silently ignored in past releases)

    pwdLastSet is now correctly honoured

    BUG 9654: the pwdLastSet attribute is now correctly handled (this previously permitted passwords that next expire).

    net ads dns unregister

    It is now possible to remove the DNS entries created with 'net ads register' with the matching 'net ads unregister' command.

    Samba-tool improvements

    Running samba-tool on the command line should now be a lot snappier. The tool now only loads the code specific to the subcommand that you wish to run.

    SMB 2.1 Leases enabled by default

    Leasing is an SMB 2.1 (and higher) feature which allows clients to
    aggressively cache files locally above and beyond the caching allowed
    by SMB 1 oplocks. This feature was disabled in previous releases, but
    the SMB2 leasing code is now considered mature and stable enough to be
    enabled by default.

    Open File Description (OFD) Locks

    On systems that support them (currently only Linux), the fileserver now
    uses Open File Description (OFD) locks instead of POSIX locks to implement client byte range locks. As these locks are associated with a specific
    file descriptor on a file this allows more efficient use when multiple descriptors having file locks are opened onto the same file. An internal tunable "smbd:force process locks = true" may be used to turn off OFD
    locks if there appear to be problems with them.

    Password sync as active directory domain controller ---------------------------------------------------

    The new commands 'samba-tool user getpassword'
    and 'samba-tool user syncpasswords' provide
    access and syncing of various password fields.

    If compiled with GPGME support (--with-gpgme) it's
    possible to store cleartext passwords in a PGP/OpenGPG
    encrypted form by configuring the new "password hash gpg key ids"
    option. This requires gpgme devel and python packages to be installed
    (e.g. libgpgme11-dev and python-gpgme on debian/ubuntu).

    Python crypto requirements

    Some samba-tool subcommands require python-crypto and/or
    python-m2crypto packages to be installed.

    SmartCard/PKINIT improvements

    "samba-tool user create" accepts --smartcard-required
    and "samba-tool user setpassword" accepts --smartcard-required
    and --clear-smartcard-required.

    Specifying --smartcard-required results in the UF_SMARTCARD_REQUIRED
    flags being set in the userAccountControl attribute.
    At the same time the account password is reset to a random
    NTHASH value.

    Interactive password logons are rejected, if the UF_SMARTCARD_REQUIRED
    bit is set in the userAccountControl attribute of a user.

    When doing a PKINIT based kerberos logon the KDC adds the
    required PAC_CREDENTIAL_INFO element to the authorization data.
    That means the NTHASH is shared between the PKINIT based client and
    the domain controller, which allows the client to do NTLM based
    authentication on behalf of the user. It also allows on offline
    logon using a smartcard to work on Windows clients.

    CTDB changes

    * New improved ctdb tool

    ctdb tool has been completely rewritten using new client API.
    Usage messages are much improved.

    * Sample CTDB configuration file is installed as ctdbd.conf.

    * The use of real-time scheduling when taking locks has been narrowed
    to limit potential performance impacts on nodes

    * CTDB_RECOVERY_LOCK now supports specification of an external helper
    to take and hold the recovery lock

    See the RECOVERY LOCK section in ctdb(7) for details. Documentation
    for writing helpers is provided in doc/cluster_mutex_helper.txt.

    * "ctdb natgwlist" has been replaced by a top level "ctdb natgw"
    command that has "master", "list" and "status" subcommands

    * The onnode command no longer supports the "recmaster", "lvs" and
    "natgw" node specifications

    * Faster resetting of TCP connections to public IP addresses during

    * Tunables MaxRedirectCount, ReclockPingPeriod,
    DeferredRebalanceOnNodeAdd are now obsolete/ignored

    * "ctdb listvars" now lists all variables, including the first one

    * "ctdb xpnn", "ctdb rebalanceip" and "ctdb rebalancenode" have been

    These are not needed because "ctdb reloadips" should do the correct

    * Output for the following commands has been simplified:

    ctdb getdbseqnum
    ctdb getdebug
    ctdb getmonmode
    ctdb getpid
    ctdb getreclock
    ctdb getpid
    ctdb pnn

    These now simply print the requested output with no preamble. This
    means that scripts no longer need to strip part of the output.

    "ctdb getreclock" now prints nothing when the recovery lock is not

    * Output for the following commands has been improved:

    ctdb setdebug
    ctdb uptime

    * "ctdb process-exists" has been updated to only take a PID argument

    The PNN can be specified with -n <PNN>. Output also cleaned up.

    * LVS support has been reworked - related commands and configuration
    variables have changed

    "ctdb lvsmaster" and "ctdb lvs" have been replaced by a top level
    "ctdb lvs" command that has "master", "list" and "status"

    See the LVS sections in ctdb(7) and ctdbd.conf(5) for details,
    including configuration changes.

    * Improved sample NFS Ganesha call-out

    New shadow_copy2 options


    With growing number of snapshots file-systems need some mechanism to
    differentiate one set of snapshots from other, e.g. monthly, weekly, manual,
    special events, etc. Therefore these file-systems provide different ways to tag
    snapshots, e.g. provide a configurable way to name snapshots, which is not just
    based on time. With only shadow:format it is very difficult to filter these
    snapshots. With this optional parameter, one can specify a variable prefix
    component for names of the snapshot directories in the file-system. If this
    parameter is set, together with the shadow:format and shadow:delimiter
    parameters it determines the possible names of snapshot directories in the
    file-system. The option only supports Basic Regular Expression (BRE).


    This optional parameter is used as a delimiter between shadow:snapprefix and
    shadow:format This parameter is used only when shadow:snapprefix is set.

    Default: shadow:delimiter = "_GMT"


    only user and username parameters
    These two parameters have long been deprecated and superseded by
    "valid users" and "invalid users".

    smb.conf changes

    Parameter Name Description Default
    -------------- ----------- -------
    kccsrv:samba_kcc Changed default yes
    ntlm auth Changed default no
    only user Removed
    password hash gpg key ids New
    shadow:snapprefix New
    shadow:delimiter New _GMT
    smb2 leases Changed default yes
    username Removed


    Currently none.

    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 ======================================================================

    Download Details

    The uncompressed tarballs and patch files have been signed
    using GnuPG (ID 6568B7EA). The source code can be downloaded


    The release notes are available online at:


    Our Code, Our Bugs, Our Responsibility.

    The Samba Team

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