4 This is the third release candidate of Samba 4.8. This is *not*
5 intended for production environments and is designed for testing
6 purposes only. Please report any defects via the Samba bug reporting
7 system at https://bugzilla.samba.org/.
9 Samba 4.8 will be the next version of the Samba suite.
15 New GUID Index mode in sam.ldb for the AD DC
16 --------------------------------------------
18 Users who upgrade a Samba AD DC in-place will experience a short delay
19 in the first startup of Samba while the sam.ldb is re-indexed.
21 Unlike in previous releases a transparent downgrade is not possible.
22 If you wish to downgrade such a DB to a Samba 4.7 or earlier version,
23 please run the source4/scripting/bin/sambaundoguididx script first.
28 New GUID Index mode in sam.ldb for the AD DC
29 --------------------------------------------
31 The new layout used for sam.ldb is GUID, rather than DN oriented.
32 This provides Samba's Active Directory Domain Controller with a faster
33 database, particularly at larger scale.
35 The underlying DB is still TDB, simply the choice of key has changed.
37 The new mode is not optional, so no configuration is required. Older
38 Samba versions cannot read the new database (see the upgrade
44 Adds Group Policy support for the Samba kdc. Applies password policies
45 (minimum/maximum password age, minimum password length, and password
46 complexity) and kerberos policies (user/service ticket lifetime and
49 Adds the samba_gpoupdate script for applying and unapplying
50 policy. Can be applied automatically by setting
52 'apply group policies = yes'.
54 Time Machine Support with vfs_fruit
55 -----------------------------------
57 Samba can be configured as a Time Machine target for Apple Mac devices
58 through the vfs_fruit module. When enabling a share for Time Machine
59 support the relevant Avahi records to support discovery will be published
60 for installations that have been built against the Avahi client library.
62 Shares can be designated as a Time Machine share with the following setting:
64 'fruit:time machine = yes'
66 Support for lower casing the MDNS Name
67 --------------------------------------
69 Allows the server name that is advertised through MDNS to be set to the
70 hostname rather than the Samba NETBIOS name. This allows an administrator
71 to make Samba registered MDNS records match the case of the hostname
72 rather than being in all capitals.
74 This can be set with the following settings:
81 Attributes deemed to be sensitive are now encrypted on disk. The sensitive
84 msDS-ExecuteScriptPassword
92 supplementalCredentials
98 This encryption is enabled by default on a new provision or join, it
99 can be disabled at provision or join time with the new option
100 '--plaintext-secrets'.
102 However, an in-place upgrade will not encrypt the database.
104 Once encrypted, it is not possible to do an in-place downgrade (eg to
105 4.7) of the database. To obtain an unencrypted copy of the database a
106 new DC join should be performed, specifying the '--plaintext-secrets'
109 The key file "encrypted_secrets.key" is created in the same directory
110 as the database and should NEVER be disclosed. It is included by the
113 Active Directory replication visualisation
114 ------------------------------------------
116 To work out what is happening in a replication graph, it is sometimes
117 helpful to use visualisations. We introduce a samba-tool subcommand to
118 write Graphviz dot output and generate text-based heatmaps of the
119 distance in hops between DCs.
121 There are two subcommands, two graphical modes, and (roughly) two modes of
122 operation with respect to the location of authority.
124 `samba-tool visualize ntdsconn` looks at NTDS Connections.
125 `samba-tool visualize reps` looks at repsTo and repsFrom objects.
127 In '--distance' mode (default), the distances between DCs are shown in
128 a matrix in the terminal. With '--color=yes', this is depicted as a
129 heatmap. With '--utf8' it is a lttle prettier.
131 In '--dot' mode, Graphviz dot output is generated. When viewed using
132 dot or xdot, this shows the network as a graph with DCs as vertices
133 and connections edges. Certain types of degenerate edges are shown in
134 different colours or line-styles.
136 NT4-style replication based net commands removed
137 ------------------------------------------------
139 The following commands and sub-commands have been removed from the
145 Also, replicating from a real NT4 domain with "net rpc vampire" and
146 "net rpc vampire keytab" has been removed.
148 The NT4-based commands were accidentially broken in 2013, and nobody
149 noticed the breakage. So instead of fixing them including tests (which
150 would have meant writing a server for the protocols, which we don't
151 have) we decided to remove them.
153 For the same reason, the "samsync", "samdeltas" and "database_redo"
154 commands have been removed from rpcclient.
156 "net rpc vampire keytab" from Active Directory domains continues to be
159 vfs_aio_linux module removed
160 ----------------------------
162 The current Linux kernel aio does not match what Samba would
163 do. Shipping code that uses it leads people to false
164 assumptions. Samba implements async I/O based on threads by default,
165 there is no special module required to see benefits of read and write
166 request being sent do the disk in parallel.
168 smbclient reparse point symlink parameters reversed
169 ---------------------------------------------------
171 A bug in smbclient caused the 'symlink' command to reverse the
172 meaning of the new name and link target parameters when creating a
173 reparse point symlink against a Windows server. As this is a
174 little used feature the ordering of these parameters has been
175 reversed to match the parameter ordering of the UNIX extensions
176 'symlink' command. The usage message for this command has also
177 been improved to remove confusion.
182 The dependency to global list of trusted domains within
183 the winbindd processes has been reduced a lot.
185 The construction of that global list is not reliable and often
186 incomplete in complex trust setups. In most situations the list is not needed
187 any more for winbindd to operate correctly. E.g. for plain file serving via SMB
188 using a simple idmap setup with autorid, tdb or ad. However some more complex
189 setups require the list, e.g. if you specify idmap backends for specific
190 domains. Some pam_winbind setups may also require the global list.
192 If you have a setup that doesn't require the global list, you should set
193 "winbind scan trusted domains = no".
195 VirusFilter VFS module
196 ----------------------
198 This new module integrates with Sophos, F-Secure and ClamAV anti-virus
199 software to provide scanning and filtering of files on a Samba share.
205 The two commands 'net serverid list' and 'net serverid wipe' have been
206 removed, because the file serverid.tdb is not used anymore.
208 'net serverid list' can be replaced by listing all files in the
209 subdirectory "msg.lock" of Samba's "lock directory". The unique id
210 listed by 'net serverid list' is stored in every process' lockfile in
213 'net serverid wipe' is not necessary anymore. It was meant primarily
214 for clustered environments, where the serverid.tdb file was not
215 properly cleaned up after single node crashes. Nowadays smbd and
216 winbind take care of cleaning up the msg.lock and msg.sock directories
223 Parameter Name Description Default
224 -------------- ----------- -------
225 apply group policies New no
228 client schannel Default changed/ yes
230 gpo update command New
231 ldap ssl ads Deprecated
232 map untrusted to domain Removed
233 oplock contention limit Removed
234 prefork children New 1
235 mdns name New netbios
236 fruit:time machine New false
239 server schannel Default changed/ yes
242 winbind scan trusted domains New yes
243 winbind trusted domains only Removed
246 CHANGES SINCE 4.8.0rc2
247 ======================
249 o Trever L. Adams <trever.adams@gmail.com>
250 * BUG 13246: Backport Samba VirusFilter.
252 o Ralph Boehme <slow@samba.org>
253 * BUG 13228: dbcheck: Add support for restoring missing forward links.
255 o Günther Deschner <gd@samba.org>
256 * BUG 13221: python: fix the build with python3.
258 o Stefan Metzmacher <metze@samba.org>
259 * BUG 13228: dbcheck: Add support for restoring missing forward links.
262 CHANGES SINCE 4.8.0rc1
263 ======================
265 o Günther Deschner <gd@samba.org>
266 * BUG 13227: packaging: Fix default systemd-dir path.
267 * BUG 13238: build: Deal with recent glibc sunrpc header removal.
269 o Stefan Metzmacher <metze@samba.org>
270 * BUG 13228: repl_meta_data: fix linked attribute corruption on databases
271 with unsorted links on expunge.
273 o Christof Schmitt <cs@samba.org>
274 * BUG 13217: s3/smbd: Remove file system sharemode before calling unlink.
276 o Andreas Schneider <asn@samba.org>
277 * BUG 13209: Small improvements in winbindd for the resource cleanup in error
279 * BUG 13238: Make Samba work with tirpc and libnsl2.
285 https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.8#Release_blocking_bugs
288 #######################################
289 Reporting bugs & Development Discussion
290 #######################################
292 Please discuss this release on the samba-technical mailing list or by
293 joining the #samba-technical IRC channel on irc.freenode.net.
295 If you do report problems then please try to send high quality
296 feedback. If you don't provide vital information to help us track down
297 the problem then you will probably be ignored. All bug reports should
298 be filed under the Samba 4.1 and newer product in the project's Bugzilla
299 database (https://bugzilla.samba.org/).
302 ======================================================================
303 == Our Code, Our Bugs, Our Responsibility.
305 ======================================================================