Release Announcements
=====================
-This is the first release candidate of Samba 4.2. This is *not*
+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 4.2 will be the next version of the Samba suite.
+Samba 4.5 will be the next version of the Samba suite.
UPGRADING
=========
-Read the "Winbindd/Netlogon improvements" section (below) carefully!
+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.
-NEW FEATURES
-============
+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".
+
+
+NEW FEATURES/CHANGES
+====================
+
+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.
+
+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).
-Transparent File Compression
-============================
+net ads dns unregister
+----------------------
-Samba 4.2.0 adds support for the manipulation of file and folder
-compression flags on the Btrfs filesystem.
-With the Btrfs Samba VFS module enabled, SMB2+ compression flags can
-be set remotely from the Windows Explorer File->Properties->Advanced
-dialog. Files flagged for compression are transparently compressed
-and uncompressed when accessed or modified.
+It is now possible to remove the DNS entries created with 'net ads register'
+with the matching 'net ads unregister' command.
-Previous File Versions with Snapper
-===================================
+Samba-tool improvements
+------------------------
-The newly added Snapper VFS module exposes snapshots managed by
-Snapper for use by Samba. This provides the ability for remote
-clients to access shadow-copies via Windows Explorer using the
-"previous versions" dialog.
+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.
-Winbindd/Netlogon improvements
-==============================
+SMB 2.1 Leases enabled by default
+---------------------------------
-The whole concept of maintaining the netlogon secure channel
-to (other) domain controllers is rewritten in order to maintain
-global state in a netlogon_creds_cli.tdb. This is the proper fix
-for a large number of bugs:
+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.
- https://bugzilla.samba.org/show_bug.cgi?id=6563
- https://bugzilla.samba.org/show_bug.cgi?id=7944
- https://bugzilla.samba.org/show_bug.cgi?id=7945
- https://bugzilla.samba.org/show_bug.cgi?id=7568
- https://bugzilla.samba.org/show_bug.cgi?id=8599
+Open File Description (OFD) Locks
+---------------------------------
-In addition a strong session key is required by default now,
-which means that communication to older servers or clients
-might be rejected by default.
+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.
-For the client side we the following new options:
-"require strong key" (yes by default), "reject md5 servers" (no by default).
-E.g. for Samba 3.0.37 you need "require strong key = no" and
-for NT4 DCs you need "require strong key = no" and "client NTLMv2 auth = no",
+Password sync as active directory domain controller
+---------------------------------------------------
-On the server side (as domain controller) we have the following new options:
-"allow nt4 crypto" (no by default), "reject md5 client" (no by default).
-E.g. in order to allow Samba < 3.0.27 or NT4 members to work
-you need "allow nt4 crypto = yes"
+The new commands 'samba-tool user getpassword'
+and 'samba-tool user syncpasswords' provide
+access and syncing of various password fields.
-winbindd does not list group memberships for display purposes
-(e.g. getent group <domain\<group>) anymore by default.
-The new default is "winbind expand groups = 0" now,
-the reason for this is the same as for "winbind enum users = no"
-and "winbind enum groups = no". Providing this information is not always
-reliably possible, e.g. if there're trusted domains.
+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).
-Please consult the smb.conf manpage for more details of this new options.
+Python crypto requirements
+--------------------------
-Larger IO sizes for SMB2/3 by default
-=====================================
+Some samba-tool subcommands require python-crypto and/or
+python-m2crypto packages to be installed.
-The default values for "smb2 max read", "smb2 max write" and "smb2 max trans"
-have been changed to 8388608 (8MiB) in order to match the default of
-Windows 2012R2.
-Improved DCERPC man in the middle detection
-===========================================
+REMOVED FEATURES
+================
-The DCERPC header signing has been implemented
-in addition to the dcerpc_sec_verification_trailer
-protection.
+only user and username parameters
+---------------------------------
+These two parameters have long been deprecated and superseded by
+"valid users" and "invalid users".
-######################################################################
-Changes
-#######
smb.conf changes
-----------------
+================
- Parameter Name Description Default
- -------------- ----------- -------
+ Parameter Name Description Default
+ -------------- ----------- -------
+ kccsrv:samba_kcc Changed default yes
+ ntlm auth Changed default no
+ only user Removed
+ password hash gpg key ids New
+ smb2 leases Changed default yes
+ username Removed
- allow nt4 crypto New no
- neutralize nt4 emulation New no
- reject md5 client New no
- reject md5 servers New no
- require strong key New yes
- smb2 max read Changed default 8388608
- smb2 max write Changed default 8388608
- smb2 max trans Changed default 8388608
- winbind expand groups Changed default 0
KNOWN ISSUES
============
+Currently none.
#######################################
Reporting bugs & Development Discussion
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 4.2 product in the project's Bugzilla
+be filed under the Samba 4.1 and newer product in the project's Bugzilla
database (https://bugzilla.samba.org/).
git.samba.org / samba.git / blobdiff