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Release Announcements
=====================
This is the first release candidate of Samba 4.2. 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.
UPGRADING
=========
Read the "Winbindd/Netlogon improvements" section (below) carefully!
NEW FEATURES
============
Transparent File Compression
============================
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.
Previous File Versions with Snapper
===================================
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.
Winbindd/Netlogon improvements
==============================
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:
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
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.
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",
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"
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.
Please consult the smb.conf manpage for more details of this new options.
Larger IO sizes for SMB2/3 by default
=====================================
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
===========================================
The DCERPC header signing has been implemented
in addition to the dcerpc_sec_verification_trailer
protection.
######################################################################
Changes
#######
smb.conf changes
----------------
Parameter Name Description Default
-------------- ----------- -------
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
============
#######################################
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 4.2 product in the project's Bugzilla
database (https://bugzilla.samba.org/).
======================================================================
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
======================================================================
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