                   ==============================
                   Release Notes for Samba 4.20.8
                           March 25, 2025
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.7
--------------------

o  Jeremy Allison <jra@samba.org>
   * BUG 15782: winbindd shows memleak in kerberos_decode_pac.

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15738: Creation of GPOs applicable to more than one group is impossible
     with Samba 4.20.0 and later.
   * BUG 15795: ldb index cache is too small on known large transactions
     (schemaupgrade, provision).

o  Ralph Boehme <slow@samba.org>
   * BUG 15151: vfs_gpfs silently garbles timestamps > year 2106.
   * BUG 15796: Spotlight search results don't show file size and creation date.

o  Guenther Deschner <gd@samba.org>
   * BUG 15703: General improvements for vfs_ceph_new module.

o  Andréas Leroux <aleroux@tranquil.it>
   * BUG 15795: ldb index cache is too small on known large transactions
     (schemaupgrade, provision).

o  Stefan Metzmacher <metze@samba.org>
   * BUG 14213: Windows Explorer crashes on S-1-22-* Unix-SIDs when accessing
     security tab.
   * BUG 15783: NETLOGON_NTLMV2_ENABLED is missing in the SamLogon* user_flags
     field.

o  Anoop C S <anoopcs@samba.org>
   * BUG 15703: General improvements for vfs_ceph_new module.
   * BUG 15797: Unable to connect to CephFS subvolume shares with
     vfs_shadow_copy2.

o  Martin Schwenke <mschwenke@ddn.com>
   * BUG 15820: Incorrect FSF address in ctdb pcp scripts.

o  Shachar Sharon <ssharon@redhat.com>
   * BUG 15703: General improvements for vfs_ceph_new module.

o  Shweta Sodani <ssodani@redhat.com>
   * BUG 15703: General improvements for vfs_ceph_new module.

o  Jo Sutton <josutton@catalyst.net.nz>
   * BUG 15634: unicodePwd cannot be modified over ldapi.

o  Andrea Venturoli <ml@netfence.it>
   * BUG 15804: "samba-tool domain backup offline" hangs.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


Release notes for older releases follow:
----------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.7
                          January 21, 2025
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.6
--------------------

o  Vinit Agnihotri <vagnihot@redhat.com>
   * BUG 15780: Increasing slowness of sharesec performance with high number of
     registry shares.

o  Ralph Boehme <slow@samba.org>
   * BUG 15697: Compound rename from Mac clients can fail with
     NT_STATUS_INTERNAL_ERROR if the file has a lease.
   * BUG 15754: Panic in close_directory.

o  Guenther Deschner <gd@samba.org>
   * BUG 15780: Increasing slowness of sharesec performance with high number of
     registry shares.

o  Pavel Filipenský <pfilipensky@samba.org>
   * BUG 15724: vfs crossrename seems not work correctly.

o  Volker Lendecke <vl@samba.org>
   * BUG 15771: Memory leak wbcCtxLookupSid. samba-4.21.2.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15765: Fix heap-user-after-free with association groups.
   * BUG 15769: The values from hresult_errstr_const and hresult_errstr are
     reversed in 4.20 and 4.21.
   * BUG 15778: Kerberos referral tickets are generated for principals in our
     domain if we have a trust to a top level domain.

o  Martin Schwenke <mschwenke@ddn.com>
   * BUG 15320: Update CTDB to track all TCP connections to public IP addresses.
   * BUG 15755: Avoid event failure race when disabling an event script.

o  Jones Syue <jonessyue@qnap.com>
   * BUG 15724: vfs crossrename seems not work correctly.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.6
                         November 19, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.5
--------------------

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15590: libldb: performance issue with indexes (ldb 2.9.2 is already
     released).

o  Ralph Boehme <slow@samba.org>
   * BUG 15624: DH reconnect error handling can lead to stale sharemode entries.
   * BUG 15732: smbd fails to correctly check sharemode against OVERWRITE
     dispositions.

o  Andréas Leroux <aleroux@tranquil.it>
   * BUG 15692: Missing conversion for msDS-UserTGTLifetime, msDS-
     ComputerTGTLifetime and msDS-ServiceTGTLifetime on "samba-tool
     domain auth policy modify".

o  Stefan Metzmacher <metze@samba.org>
   * BUG 14356: Protocol error - Unclear debug message "pad length mismatch" for
     invalid bind packet.
   * BUG 15280: irpc_destructor may crash during shutdown.
   * BUG 15425: NetrGetLogonCapabilities QueryLevel 2 needs to be implemented.
   * BUG 15624: DH reconnect error handling can lead to stale sharemode entries.
   * BUG 15649: Durable handle is not granted when a previous OPEN exists with
     NoOplock.
   * BUG 15651: Durable handle is granted but reconnect fails.
   * BUG 15708: Disconnected durable handles with RH lease should not be purged
     by a new non conflicting open.
   * BUG 15740: gss_accept_sec_context() from Heimdal does not imply
     GSS_C_MUTUAL_FLAG with GSS_C_DCE_STYLE.
   * BUG 15749: winbindd should call process_set_title() for locator child.

o  Christof Schmitt <cs@samba.org>
   * BUG 15730: VFS_OPEN_HOW_WITH_BACKUP_INTENT  breaks shadow_copy2.

o  Jones Syue <jonessyue@qnap.com>
   * BUG 15706: Consistent log level for sighup handler.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.5
                         September 17, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.4
--------------------

o  Ralph Boehme <slow@samba.org>
   * BUG 15695: "inherit permissions = yes" triggers assert() in vfs_default
     when creating a stream.

o  David Disseldorp <ddiss@samba.org>
   * BUG 15699: Incorrect FSCTL_QUERY_ALLOCATED_RANGES response when truncated.

o  Pavel Filipenský <pfilipensky@samba.org>
   * BUG 15698: samba-tool can not load the default configuration file.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15696: Compound SMB2 requests don't return
     NT_STATUS_NETWORK_SESSION_EXPIRED for all requests, confuses
     MacOSX clients.

o  Anoop C S <anoopcs@samba.org>
   * BUG 15686: Add new vfs_ceph module (based on low level API).

o  Shachar Sharon <ssharon@redhat.com>
   * BUG 15686: Add new vfs_ceph module (based on low level API).
   * BUG 15700: Crash when readlinkat fails.

o  Jones Syue <jonessyue@qnap.com>
   * BUG 15677: ntlm_auth make logs more consistent with length check.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.4
                           August 06, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.

Changes since 4.20.3
--------------------

This only fixes a regression in library version strings in Samba
4.20.3, see: https://bugzilla.samba.org/show_bug.cgi?id=15673

If you compiled Samba from the sources and don't have other
applications relying on Samba's public libraries, there's
no reason to upgrade from 4.20.3 to 4.20.4.

o  Andreas Schneider <asn@samba.org>
   * BUG 15673: --version-* options are still not ergonomic, and they reject
     tilde characters.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15673: --version-* options are still not ergonomic, and they reject
     tilde characters.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.3
                           August 02, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.

LDAP TLS/SASL channel binding support
-------------------------------------

The ldap server supports SASL binds with
kerberos or NTLMSSP over TLS connections
now (either ldaps or starttls).

Setups where 'ldap server require strong auth = allow_sasl_over_tls'
was required before, can now most likely move to the
default of 'ldap server require strong auth = yes'.

If SASL binds without correct tls channel bindings are required
'ldap server require strong auth = allow_sasl_without_tls_channel_bindings'
should be used now, as 'allow_sasl_over_tls' will generate a
warning in every start of 'samba', as well as '[samba-tool ]testparm'.

This is similar to LdapEnforceChannelBinding under
HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters
on Windows.

All client tools using ldaps also include the correct
channel bindings now.

smb.conf changes
================

  Parameter Name                          Description     Default
  --------------                          -----------     -------
  ldap server require strong auth         new values

Changes since 4.20.2
--------------------

o  Andreas Schneider <asn@samba.org>
   * BUG 15683: Running samba-bgqd a a standalone systemd service does not work.

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 15655: When claims enabled with heimdal kerberos, unable to log on to a
     Windows computer when user account need to change their own password.

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15671: Invalid client warning about command line passwords.
   * BUG 15672: Version string is truncated in manpages.
   * BUG 15673: --version-* options are still not ergonomic, and they reject
     tilde characters.
   * BUG 15674: cmdline_burn does not always burn secrets.
   * BUG 15685: Samba does not parse SDDL found in defaultSecurityDescriptor in
     AD_DS_Classes_Windows_Server_v1903.ldf.

o  Jo Sutton <josutton@catalyst.net.nz>
   * BUG 15655: When claims enabled with heimdal kerberos, unable to log on to a
     Windows computer when user account need to change their own password.

o  Pavel Filipenský <pfilipensky@samba.org>
   * BUG 15660: The images don\'t build after the git security release and
     CentOS 8 Stream is EOL.

o  Ralph Boehme <slow@samba.org>
   * BUG 15676: Fix clock skew error message and memory cache clock skew
     recovery.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15603: Heimdal ignores _gsskrb5_decapsulate errors in
     init_sec_context/repl_mutual.
   * BUG 15621: s4:ldap_server: does not support tls channel bindings
     for sasl binds.

o  Xavi Hernandez <xhernandez@redhat.com>
   * BUG 15678: CTDB socket output queues may suffer unbounded delays under some
     special conditions.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.2
                           June 19, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.1
--------------------

o  Jeremy Allison <jra@samba.org>
   * BUG 15662: vfs_widelinks with DFS shares breaks case insensitivity.

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 13213: Samba build is not reproducible.
   * BUG 15569: ldb qsort might r/w out of bounds with an intransitive compare
     function.
   * BUG 15625: Many qsort() comparison functions are non-transitive, which can
     lead to out-of-bounds access in some circumstances.

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 15638: Need to change gitlab-ci.yml tags in all branches to avoid CI
     bill.
   * BUG 15654: We have added new options --vendor-name and --vendor-patch-
     revision arguments to ./configure to allow distributions and packagers to
     put their name in the Samba version string so that when debugging Samba the
     source of the binary is obvious.

o  Günther Deschner <gd@samba.org>
   * BUG 15665: CTDB RADOS mutex helper misses namespace support.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 13019: Dynamic DNS updates with the internal DNS are not working.
   * BUG 14981: netr_LogonSamLogonEx returns NR_STATUS_ACCESS_DENIED with
     SysvolReady=0.
   * BUG 15412: Anonymous smb3 signing/encryption should be allowed (similar to
     Windows Server 2022).
   * BUG 15573: Panic in dreplsrv_op_pull_source_apply_changes_trigger.
   * BUG 15620: s4:nbt_server: does not provide unexpected handling, so winbindd
     can't use nmb requests instead cldap.
   * BUG 15642: winbindd, net ads join and other things don't work on an ipv6
     only host.
   * BUG 15659: Segmentation fault when deleting files in vfs_recycle.
   * BUG 15664: Panic in vfs_offload_token_db_fetch_fsp().
   * BUG 15666: "client use kerberos" and --use-kerberos is ignored for the
     machine account.

o  Noel Power <noel.power@suse.com>
   * BUG 15435: Regression DFS not working with widelinks = true.

o  Andreas Schneider <asn@samba.org>
   * BUG 15633: samba-gpupdate - Invalid NtVer in netlogon_samlogon_response.
   * BUG 15653: idmap_ad creates an incorrect local krb5.conf in case of trusted
     domain lookups.
   * BUG 15660: The images don't build after the git security release and CentOS
     8 Stream is EOL.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.1
                            May 08, 2024
                   ==============================


This is the latest stable release of the Samba 4.20 release series.


Changes since 4.20.0
--------------------

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15630: dns update debug message is too noisy.

o  Alexander Bokovoy <ab@samba.org>
   * BUG 15635: Do not fail PAC validation for RFC8009 checksums types.

o  Pavel Filipenský <pfilipensky@samba.org>
   * BUG 15605: Improve performance of lookup_groupmem() in idmap_ad.

o  Anna Popova <popova.anna235@gmail.com>
   * BUG 15636: Smbcacls incorrectly propagates inheritance with Inherit-Only
     flag.

o  Noel Power <noel.power@suse.com>
   * BUG 15611: http library doesn't support 'chunked transfer encoding'.

o  Andreas Schneider <asn@samba.org>
   * BUG 15600: Provide a systemd service file for the background queue daemon.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat.

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


----------------------------------------------------------------------
                   ==============================
                   Release Notes for Samba 4.20.0
                           March 27, 2024
                   ==============================


This is the first stable release of the Samba 4.20 release series.
Please read the release notes carefully before upgrading.


NEW FEATURES/CHANGES
====================

New Minimum MIT Krb5 version for Samba AD Domain Controller
-----------------------------------------------------------

Samba now requires MIT 1.21 when built against a system MIT Krb5 and
acting as an Active Directory DC.  This addresses the issues that were
fixed in CVE-2022-37967 (KrbtgtFullPacSignature) and ensures that
Samba builds against the MIT version that allows us to avoid that
attack.

Removed dependency on Perl JSON module
--------------------------------------

Distributions are advised that the Perl JSON package is no longer
required by Samba builds that use the imported Heimdal.  The build
instead uses Perl's JSON::PP built into recent perl5 versions.

Current lists of packages required by Samba for major distributions
are found in the bootstrap/generated-dists/ directory of a Samba
source tree.  While there will be some differences - due to features
chosen by packagers - comparing these lists with the build dependencies
in a package may locate other dependencies we no longer require.

samba-tool user getpassword / syncpasswords ;rounds= change
-----------------------------------------------------------

The password access tool "samba-tool user getpassword" and the
password sync tool "samba-tool user syncpasswords" allow attributes to
be chosen for output, and accept parameters like
pwdLastSet;format=GeneralizedTime

These attributes then appear, in the same format, as the attributes in
the LDIF output.  This was not the case for the ;rounds= parameter of
virtualCryptSHA256 and virtualCryptSHA512, for example as
--attributes="virtualCryptSHA256;rounds=50000"

This release makes the behaviour consistent between these two
features.  Installations using GPG-encrypted passwords (or plaintext
storage) and the rounds= option, will find the output has changed

from:
virtualCryptSHA256: {CRYPT}$5$rounds=2561$hXem.M9onhM9Vuix$dFdSBwF

to:
virtualCryptSHA256;rounds=2561: {CRYPT}$5$rounds=2561$hXem.M9onhM9Vuix$dFdSBwF

Group Managed service account client-side features
--------------------------------------------------

samba-tool has been extended to provide client-side support for Group
Managed Service accounts.  These accounts have passwords that change
automatically, giving the advantages of service isolation without risk
of poor, unchanging passwords.

Where possible, Samba's existing samba-tool password handling
commands, which in the past have only operated against the local
sam.ldb have been extended to permit operation against a remote server
with authenticated access to "-H ldap://$DCNAME"

Supported operations include:
 - reading the current and previous gMSA password via
   "samba-tool user getpassword"
 - writing a Kerberos Ticket Granting Ticket (TGT) to a local
   credentials cache with a new command
   "samba-tool user get-kerberos-ticket"

New Windows Search Protocol Client
----------------------------------

Samba now by default builds new experimental Windows Search Protocol (WSP)
command line client "wspsearch"

The "wspsearch" cmd-line utility allows a WSP search request to be sent
to a server (such as a windows server) that has the (WSP)
Windows Search Protocol service configured and enabled.

For more details see the wspsearch man page.

Allow 'smbcacls' to save/restore DACLs to file
--------------------------------------------

'smbcacls' has been extended to allow DACLs to be saved and restored
to/from a file. This feature mimics the functionality that windows cmd
line tool 'icacls.exe' provides. Additionally files created either
by 'smbcalcs' or 'icacls.exe' are interchangeable and can be used by
either tool as the same file format is used.

New options added are:
 - '--save savefile'    Saves DACLs in sddl format to file
 - '--recurse'          Performs the '--save' operation above on directory
                        and all files/directories below.
 - '--restore savefile' Restores the stored DACLS to files in directory

Samba-tool extensions for AD Claims, Authentication Policies and Silos
----------------------------------------------------------------------

samba-tool now allows users to be associated with claims.  In the
Samba AD DC, claims derive from Active Directory attributes mapped
into specific names.  These claims can be used in rules, which are
conditional ACEs in a security descriptor, that decide if a user is
restricted by an authentication policy.

samba-tool also allows the creation and management of authentication
policies, which are rules about where a user may authenticate from,
if NTLM is permitted, and what services a user may authenticate to.

Finally, support is added for the creation and management of
authentication silos, which are helpful in defining network boundaries
by grouping users and the services they connect to.

Please note: The command line syntax for these tools is not final, and
may change before the next release, as we gain user feedback.  The
syntax will be locked in once Samba offers 2016 AD Functional Level as
a default.

AD DC support for Authentication Silos and Authentication Policies
------------------------------------------------------------------

The Samba AD DC now also honours any existing claims, authentication
policy and authentication silo configuration previously created (eg
from an import of a Microsoft AD), as well as new configurations
created with samba-tool.  The use of Microsoft's Powershell based
client tools is not expected to work.

To use this feature, the functional level must be set to 2012_R2 or
later with:

 ad dc functional level = 2016

in the smb.conf.

The smb.conf file on each DC must have 'ad dc functional level = 2016'
set to have the partially complete feature available.  This will also,
at first startup, update the server's own AD entry with the configured
functional level.

For new domains, add these parameters to 'samba-tool provision'

--option="ad dc functional level = 2016" --function-level=2016

The second option, setting the overall domain functional level
indicates that all DCs should be at this functional level.

To raise the domain functional level of an existing domain, after
updating the smb.conf and restarting Samba run
samba-tool domain schemaupgrade --schema=2019
samba-tool domain functionalprep --function-level=2016
samba-tool domain level raise --domain-level=2016 --forest-level=2016

This support is still new, so is not enabled by default in this
release.  The above instructions are set at 2016, which while not
complete, matches what our testing environment validates.

Conditional ACEs and Resource Attribute ACEs
--------------------------------------------

Ordinary Access Control Entries (ACEs) unconditionally allow or deny
access to a given user or group. Conditional ACEs have an additional
section that describes conditions under which the ACE applies. If the
conditional expression is true, the ACE works like an ordinary ACE,
otherwise it is ignored. The condition terms can refer to claims,
group memberships, and attributes on the object itself. These
attributes are described in Resource Attribute ACEs that occur in the
object's System Access Control List (SACL). Conditional ACEs are
described in Microsoft documentation.

Conditional ACE evaluation is controlled by the "acl claims
evaluation" smb.conf option. The default value is "AD DC only" which
enables them in AD DC settings. The other option is "never", which
disables them altogether. There is currently no option to enable them
on the file server (this is likely to change in future releases).

The Security Descriptor Definition Language has extensions for
conditional ACEs and resource attribute ACEs; these are now supported
by Samba.

Service Witness Protocol [MS-SWN]
---------------------------------

In a ctdb cluster it is now possible to provide
the SMB witness service that allows clients to
monitor their current smb connection to cluster
node A by asking cluster node B to notify the
client if the ip address from node A or the
whole node A becomes unavailable.

For disk shares in a ctdb cluster
SMB2_SHARE_CAP_SCALEOUT is now always returned
for SMB3 tree connect responses.

If the witness service is active
SMB2_SHARE_CAP_CLUSTER is now also returned.

In order to activate the witness service
"rpc start on demand helpers = no" needs to
be configured in the global section.
At the same time the 'samba-dcerpcd' service
needs to be started explicitly, typically
with the '--libexec-rpcds' option in order
to make all available services usable.
One important aspect is that tcp ports
135 (for the endpoint mapper) and various
ports in the 'rpc server dynamic port range'
will be used to provide the witness service
(rpcd_witness).

ctdb provides a '47.samba-dcerpcd.script' in order
to manage the samba-dcerpcd.service.
Typically as systemd service, but that's up
to the packager and/or admin.

Please note that current windows client
requires SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
in addition to SMB2_SHARE_CAP_CLUSTER in order
to make use of the witness service.
But SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY implies
the windows clients always ask for persistent handle
(which are not implemented in samba yet), so
that every open generates a warning in the
windows smb client event log.
That's why SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
is not returned by default.
An explicit 'smb3 share cap:CONTINUOUS AVAILABILITY = yes'
is needed.

There are also new 'net witness' commands in order
to let the admin list active client registrations
or ask specific clients to move their smb connection
to another cluster node. These are available:

 net witness list
 net witness client-move
 net witness share-move
 net witness force-unregister
 net witness force-response

Consult 'man net' or 'net witness help' for further details.


REMOVED FEATURES
================

Get locally logged on users from utmp
-------------------------------------

The Workstation Service Remote Protocol [MS-WKST] calls NetWkstaGetInfo
level 102 and NetWkstaEnumUsers level 0 and 1 return the list of locally
logged on users. Samba was getting the list from utmp, which is not
Y2038 safe. This feature has been completely removed and Samba will
always return an empty list.


smb.conf changes
================

  Parameter Name                          Description     Default
  --------------                          -----------     -------
  ldap server require strong auth         new values             (4.20.3)
  acl claims evaluation                   new             AD DC only
  smb3 unix extensions                    Per share       -
  smb3 share cap:ASYMMETRIC               new             no
  smb3 share cap:CLUSTER                  new             see 'man smb.conf'
  smb3 share cap:CONTINUOUS AVAILABILITY  new             no
  smb3 share cap:SCALE OUT                new             see 'man smb.conf'


Changes since 4.20.0rc4
=======================

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15606: Avoid null-dereference with bad claims.
   * BUG 15613: ndr_pull_security_ace can leave resource attribute ACE coda
     claim struct undefined.

o  Ralph Boehme <slow@samba.org>
   * BUG 15527: fd_handle_destructor() panics within an smbd_smb2_close() if
     vfs_stat_fsp() fails in fd_close().

o  Björn Jacke <bjacke@samba.org>
   * BUG 15583: set_nt_acl sometimes fails with NT_STATUS_INVALID_PARAMETER -
     openat() EACCES.

o  Noel Power <noel.power@suse.com>
   * BUG 15527: fd_handle_destructor() panics within an smbd_smb2_close() if
     vfs_stat_fsp() fails in fd_close().

o  Andreas Schneider <asn@samba.org>
   * BUG 15599: libgpo: Segfault in python bindings.

o  Jo Sutton <josutton@catalyst.net.nz>
   * BUG 15607: Samba AD is missing some authentication policy tests.


CHANGES SINCE 4.20.0rc3
=======================

o  Andreas Schneider <asn@samba.org>
   * BUG 15588: samba-gpupdate: Correctly implement site support.


CHANGES SINCE 4.20.0rc2
=======================

o  Rob van der Linde <rob@catalyst.net.nz>
   * BUG 15575: Remove unsupported "Final" keyword missing from Python 3.6.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15577: Additional witness backports for 4.20.0.

o  Noel Power <noel.power@suse.com>
   * BUG 15579: Error output with wspsearch.

o  Martin Schwenke <mschwenke@ddn.com>
   * BUG 15580: Packet marshalling push support missing for
     CTDB_CONTROL_TCP_CLIENT_DISCONNECTED and
     CTDB_CONTROL_TCP_CLIENT_PASSED.

o  Jo Sutton <josutton@catalyst.net.nz>
   * BUG 15575: Remove unsupported "Final" keyword missing from Python 3.6.


CHANGES SINCE 4.20.0rc1
=======================

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15574: Performance regression for NDR parsing of security descriptors.

o  Anoop C S <anoopcs@samba.org>
   * BUG 15565: Build and install man page for wspsearch client utility.

o  Andreas Schneider <asn@samba.org>
   * BUG 15558: samba-gpupdate logging doesn't work.


KNOWN ISSUES
============

https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.20#Release_blocking_bugs


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical:matrix.org matrix room, or
#samba-technical IRC channel on irc.libera.chat

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

