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.
25 smbclient reparse point symlink parameters reversed
26 ---------------------------------------------------
28 See the more detailed description below.
34 New GUID Index mode in sam.ldb for the AD DC
35 --------------------------------------------
37 The new layout used for sam.ldb is GUID, rather than DN oriented.
38 This provides Samba's Active Directory Domain Controller with a faster
39 database, particularly at larger scale.
41 The underlying DB is still TDB, simply the choice of key has changed.
43 The new mode is not optional, so no configuration is required. Older
44 Samba versions cannot read the new database (see the upgrade
50 Adds Group Policy support for the Samba kdc. Applies password policies
51 (minimum/maximum password age, minimum password length, and password
52 complexity) and kerberos policies (user/service ticket lifetime and
55 Adds the samba_gpoupdate script for applying and unapplying
56 policy. Can be applied automatically by setting
58 'apply group policies = yes'.
60 Time Machine Support with vfs_fruit
61 -----------------------------------
63 Samba can be configured as a Time Machine target for Apple Mac devices
64 through the vfs_fruit module. When enabling a share for Time Machine
65 support the relevant Avahi records to support discovery will be published
66 for installations that have been built against the Avahi client library.
68 Shares can be designated as a Time Machine share with the following setting:
70 'fruit:time machine = yes'
72 Support for lower casing the MDNS Name
73 --------------------------------------
75 Allows the server name that is advertised through MDNS to be set to the
76 hostname rather than the Samba NETBIOS name. This allows an administrator
77 to make Samba registered MDNS records match the case of the hostname
78 rather than being in all capitals.
80 This can be set with the following settings:
87 Attributes deemed to be sensitive are now encrypted on disk. The sensitive
90 msDS-ExecuteScriptPassword
98 supplementalCredentials
104 This encryption is enabled by default on a new provision or join, it
105 can be disabled at provision or join time with the new option
106 '--plaintext-secrets'.
108 However, an in-place upgrade will not encrypt the database.
110 Once encrypted, it is not possible to do an in-place downgrade (eg to
111 4.7) of the database. To obtain an unencrypted copy of the database a
112 new DC join should be performed, specifying the '--plaintext-secrets'
115 The key file "encrypted_secrets.key" is created in the same directory
116 as the database and should NEVER be disclosed. It is included by the
119 Active Directory replication visualisation
120 ------------------------------------------
122 To work out what is happening in a replication graph, it is sometimes
123 helpful to use visualisations. We introduce a samba-tool subcommand to
124 write Graphviz dot output and generate text-based heatmaps of the
125 distance in hops between DCs.
127 There are two subcommands, two graphical modes, and (roughly) two modes of
128 operation with respect to the location of authority.
130 `samba-tool visualize ntdsconn` looks at NTDS Connections.
131 `samba-tool visualize reps` looks at repsTo and repsFrom objects.
133 In '--distance' mode (default), the distances between DCs are shown in
134 a matrix in the terminal. With '--color=yes', this is depicted as a
135 heatmap. With '--utf8' it is a lttle prettier.
137 In '--dot' mode, Graphviz dot output is generated. When viewed using
138 dot or xdot, this shows the network as a graph with DCs as vertices
139 and connections edges. Certain types of degenerate edges are shown in
140 different colours or line-styles.
143 smbclient reparse point symlink parameters reversed
144 ---------------------------------------------------
146 A bug in smbclient caused the 'symlink' command to reverse the
147 meaning of the new name and link target parameters when creating a
148 reparse point symlink against a Windows server. As this is a
149 little used feature the ordering of these parameters has been
150 reversed to match the parameter ordering of the UNIX extensions
151 'symlink' command. The usage message for this command has also
152 been improved to remove confusion.
157 The dependency to global list of trusted domains within
158 the winbindd processes has been reduced a lot.
160 The construction of that global list is not reliable and often
161 incomplete in complex trust setups. In most situations the list is not needed
162 any more for winbindd to operate correctly. E.g. for plain file serving via SMB
163 using a simple idmap setup with autorid, tdb or ad. However some more complex
164 setups require the list, e.g. if you specify idmap backends for specific
165 domains. Some pam_winbind setups may also require the global list.
167 If you have a setup that doesn't require the global list, you should set
168 "winbind scan trusted domains = no".
170 Improved support for trusted domains (as AD DC)
171 -----------------------------------------------
173 The support for trusted domains/forests has improved a lot.
175 External domain trusts, as well a transitive forest trusts,
176 are supported in both directions (inbound and outbound)
177 for Kerberos and NTLM authentication now.
179 The LSA LookupNames and LookupSids implementations
180 support resolving names and sids from trusts domains/forest
181 now. This is important in order to allow Samba based
182 domain members to make use of the trust.
184 However there are currently still a few limitations:
186 - It's not possible to add users/groups of a trusted domain
187 into domain groups. So group memberships are not expanded
189 See https://bugzilla.samba.org/show_bug.cgi?id=13300
190 - Both sides of the trust need to fully trust each other!
191 - No SID filtering rules are applied at all!
192 - This means DCs of domain A can grant domain admin rights
194 - Selective (CROSS_ORIGANIZATION) authentication is
195 not supported. It's possible to create such a trust,
196 but the KDC and winbindd ignore them.
198 VirusFilter VFS module
199 ----------------------
201 This new module integrates with Sophos, F-Secure and ClamAV anti-virus
202 software to provide scanning and filtering of files on a Samba share.
208 'net serverid' commands removed
209 -------------------------------
211 The two commands 'net serverid list' and 'net serverid wipe' have been
212 removed, because the file serverid.tdb is not used anymore.
214 'net serverid list' can be replaced by listing all files in the
215 subdirectory "msg.lock" of Samba's "lock directory". The unique id
216 listed by 'net serverid list' is stored in every process' lockfile in
219 'net serverid wipe' is not necessary anymore. It was meant primarily
220 for clustered environments, where the serverid.tdb file was not
221 properly cleaned up after single node crashes. Nowadays smbd and
222 winbind take care of cleaning up the msg.lock and msg.sock directories
225 NT4-style replication based net commands removed
226 ------------------------------------------------
228 The following commands and sub-commands have been removed from the
234 Also, replicating from a real NT4 domain with "net rpc vampire" and
235 "net rpc vampire keytab" has been removed.
237 The NT4-based commands were accidentally broken in 2013, and nobody
238 noticed the breakage. So instead of fixing them including tests (which
239 would have meant writing a server for the protocols, which we don't
240 have) we decided to remove them.
242 For the same reason, the "samsync", "samdeltas" and "database_redo"
243 commands have been removed from rpcclient.
245 "net rpc vampire keytab" from Active Directory domains continues to be
248 vfs_aio_linux module removed
249 ----------------------------
251 The current Linux kernel aio does not match what Samba would
252 do. Shipping code that uses it leads people to false
253 assumptions. Samba implements async I/O based on threads by default,
254 there is no special module required to see benefits of read and write
255 request being sent do the disk in parallel.
261 Parameter Name Description Default
262 -------------- ----------- -------
263 apply group policies New no
266 client schannel Default changed/ yes
268 gpo update command New
269 ldap ssl ads Deprecated
270 map untrusted to domain Removed
271 oplock contention limit Removed
272 prefork children New 1
273 mdns name New netbios
274 fruit:time machine New false
277 server schannel Default changed/ yes
280 winbind scan trusted domains New yes
281 winbind trusted domains only Removed
284 CHANGES SINCE 4.8.0rc2
285 ======================
287 o Trever L. Adams <trever.adams@gmail.com>
288 * BUG 13246: Backport Samba VirusFilter.
290 o Ralph Boehme <slow@samba.org>
291 * BUG 13228: dbcheck: Add support for restoring missing forward links.
293 o Günther Deschner <gd@samba.org>
294 * BUG 13221: python: fix the build with python3.
296 o Stefan Metzmacher <metze@samba.org>
297 * BUG 13228: dbcheck: Add support for restoring missing forward links.
300 CHANGES SINCE 4.8.0rc1
301 ======================
303 o Günther Deschner <gd@samba.org>
304 * BUG 13227: packaging: Fix default systemd-dir path.
305 * BUG 13238: build: Deal with recent glibc sunrpc header removal.
307 o Stefan Metzmacher <metze@samba.org>
308 * BUG 13228: repl_meta_data: fix linked attribute corruption on databases
309 with unsorted links on expunge.
311 o Christof Schmitt <cs@samba.org>
312 * BUG 13217: s3/smbd: Remove file system sharemode before calling unlink.
314 o Andreas Schneider <asn@samba.org>
315 * BUG 13209: Small improvements in winbindd for the resource cleanup in error
317 * BUG 13238: Make Samba work with tirpc and libnsl2.
323 https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.8#Release_blocking_bugs
326 #######################################
327 Reporting bugs & Development Discussion
328 #######################################
330 Please discuss this release on the samba-technical mailing list or by
331 joining the #samba-technical IRC channel on irc.freenode.net.
333 If you do report problems then please try to send high quality
334 feedback. If you don't provide vital information to help us track down
335 the problem then you will probably be ignored. All bug reports should
336 be filed under the Samba 4.1 and newer product in the project's Bugzilla
337 database (https://bugzilla.samba.org/).
340 ======================================================================
341 == Our Code, Our Bugs, Our Responsibility.
343 ======================================================================