[Bug 1598463] Re: samba client negotiates down to NT1 instead of up to SMB3_11, doesn't happen with Windows 10 client

Fri Aug 4 23:08:41 UTC 2017

Julian Alarcon, this report is scoped only to not getting maximum
negotiation upon a successful connection, not your problem of it won't
connect at all.

However, given the security implications of using NT1, the original
premise of this report isn't valid, and is no longer of use to me as the
original reporter.

Hence, if you have a problem file a new report (not status toggle this
one).

** Changed in: samba (Ubuntu)
       Status: Confirmed => Invalid

** Changed in: samba (Ubuntu)
   Importance: High => Undecided

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Title:
  samba client negotiates down to NT1 instead of up to SMB3_11, doesn't
  happen with Windows 10 client

Status in samba package in Ubuntu:
  Invalid

Bug description:
  Clients: Windows 10 Pro 64-bit, Ubuntu 16.04

  Client and server samba version:
  apt policy samba
  samba:
    Installed: 2:4.3.9+dfsg-0ubuntu0.16.04.2
    Candidate: 2:4.3.9+dfsg-0ubuntu0.16.04.2
    Version table:
   *** 2:4.3.9+dfsg-0ubuntu0.16.04.2 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
          100 /var/lib/dpkg/status
       2:4.3.8+dfsg-0ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  What is expected to happen is by default if one makes a connection via
  Ubuntu 16.04 using Nautilus or smbclient to Ubuntu 16.04 samba server,
  it automatically negotiates to the highest protocol available from the
  samba server (SMB3_11), just like it does when connecting from a
  Windows 10 client.

  What happens instead is via Nautilus or smbclient it consistently
  negotiates to NT1, making the share useless from a speed perspective
  when connecting over ethernet or 802.11ac.

  From the client:
  $ smbclient //192.168.0.107/share

  On the server:
  $ sudo smbstatus

  Samba version 4.3.9-Ubuntu
  PID     Username      Group         Machine            Protocol Version       
  ------------------------------------------------------------------------------
  3970      moniker       moniker       192.168.0.101 (ipv4:192.168.0.101:49966) NT1         

  Service      pid     machine       Connected at
  -------------------------------------------------------
  share        3970   192.168.0.101  Sat Jul  2 11:09:09 2016

  No locked files

  However, if I modify the smbclient as follows it does negotiate to SMB3_11:
  smbclient //192.168.0.107/share -m SMB3_11

  From the server:
  sudo smbstatus

  Samba version 4.3.9-Ubuntu
  PID     Username      Group         Machine            Protocol Version       
  ------------------------------------------------------------------------------
  3980      moniker       moniker       192.168.0.101 (ipv4:192.168.0.101:49968) Unknown (0x0311)

  Service      pid     machine       Connected at
  -------------------------------------------------------
  share        3980   192.168.0.101  Sat Jul  2 11:10:34 2016

  No locked files

  From the server:
  $ smbclient -L localhost
  Domain=[WORKGROUP] OS=[Windows 6.1] Server=[Samba 4.3.9-Ubuntu]

  	Sharename       Type      Comment
  	---------       ----      -------
  	print$          Disk      Printer Drivers
  	IPC$            IPC       IPC Service (pc server (Samba, Ubuntu))
  	share           Disk      
  Domain=[WORKGROUP] OS=[Windows 6.1] Server=[Samba 4.3.9-Ubuntu]

  	Server               Comment
  	---------            -------
  	PC                   pc server (Samba, Ubuntu)

  	Workgroup            Master
  	---------            -------
  	WORKGROUP            

  The smb.conf file is default with a handful of changes below, not relating to protocol (removing them doesn't change anything). Also, declaring min protocol to be SMB3 causes the share not to be visible by Nautilus:
  [global]
  encrypt passwords = true
  server signing = mandatory
  inherit acls = yes
  inherit owner = yes
  inherit permissions = yes

  [share]
  path = /home/moniker/Desktop/share
  read only = no
  guest ok = yes
  writeable = yes
  browseable = yes

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: samba 2:4.3.9+dfsg-0ubuntu0.16.04.2
  ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
  Uname: Linux 4.4.0-28-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: GNOME-Flashback:Unity
  Date: Sat Jul  2 11:05:33 2016
  InstallationDate: Installed on 2015-12-18 (196 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  SambaClientRegression: No
  SourcePackage: samba
  UpgradeStatus: Upgraded to xenial on 2016-01-20 (164 days ago)

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