[Pkg-samba-maint] Bug#942433: samba: Cannot mount share on samba3 server from samba4 client: protocol negotiation failed
Igor Liferenko
igor.liferenko at gmail.com
Wed Oct 16 10:16:32 BST 2019
Package: samba
Version: 2:4.11.0+dfsg-10
Severity: important
Dear Maintainer,
After upgrade from samba 4.9.13 to 4.11.0, mounting shares from samba3 server stopped working.
Here is the output of "GVFS_DEBUG=1 /usr/lib/gvfs/gvfsd --replace" from
"gio mount smb://x.x.x.x/doc/":
smb: g_vfs_backend_smb_init: default workgroup = 'NULL'
smb: Added new job source 0x55c74aa13080 (GVfsBackendSmb)
smb: Queued new job 0x55c74aa15140 (GVfsJobMount)
smb: do_mount - URI = smb://x.x.x.x/doc
smb: do_mount - try #0
smb: auth_callback - kerberos pass
smb: auth_callback - out: last_user = 'user', last_domain = 'XGROUP'
smb: do_mount - [smb://x.x.x.x/doc; 0] res = -1, cancelled = 0, errno = [103] 'Software caused connection abort'
smb: do_mount - (errno != EPERM && errno != EACCES), cancelled = 0, breaking
smb: send_reply(0x55c74aa15140), failed=1 (Failed to mount Windows share: Software caused connection abort)
Wireshark shows only one packet from client after connecting to server:
"Protocol" header in wireshark is "SMB2" and "Info" header is "Negotiate Protocol Request"
and then server closes connection.
Here is config of samba3 server:
[global]
dos charset = 866
unix charset = UTF8
workgroup = USVGROUP
server string = %h server
interfaces = 127.0.0.0/8, x.x.x.x/24
security = SHARE
obey pam restrictions = Yes
pam password change = Yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
unix password sync = Yes
syslog = 0
log file = /var/log/samba/log.%m
max log size = 1000
dns proxy = No
panic action = /usr/share/samba/panic-action %d
veto files = /lost+found/
[doc]
path = /home/doc/
read only = No
guest ok = Yes
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
* What exactly did you do (or not do) that was effective (or
ineffective)?
* What was the outcome of this action?
* What outcome did you expect instead?
*** End of the template - remove these template lines ***
-- Package-specific info:
* /etc/samba/smb.conf present, and attached
* /var/lib/samba/dhcp.conf not present
-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 5.2.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages samba depends on:
ii adduser 3.118
ii dpkg 1.19.7
ii init-system-helpers 1.57
ii libbsd0 0.10.0-1
ii libc6 2.29-2
ii libgnutls30 3.6.9-5
ii libldb2 2:2.0.7-3
ii libpam-modules 1.3.1-5
ii libpam-runtime 1.3.1-5
ii libpopt0 1.16-12
ii libpython3.7 3.7.5~rc1-2
ii libtalloc2 2.3.0-2
ii libtasn1-6 4.14-3
ii libtdb1 1.4.2-2
ii libtevent0 0.10.1-3
ii libwbclient0 2:4.11.0+dfsg-10
ii lsb-base 11.1.0
ii procps 2:3.3.15-2+b1
ii python3 3.7.5-1
ii python3-dnspython 1.16.0-1
ii python3-samba 2:4.11.0+dfsg-10
ii samba-common 2:4.11.0+dfsg-10
ii samba-common-bin 2:4.11.0+dfsg-10
ii samba-libs 2:4.11.0+dfsg-10
ii tdb-tools 1.4.2-2
Versions of packages samba recommends:
ii attr 1:2.4.48-5
ii logrotate 3.15.1-1
ii samba-dsdb-modules 2:4.11.0+dfsg-10
ii samba-vfs-modules 2:4.11.0+dfsg-10
Versions of packages samba suggests:
pn bind9 <none>
pn bind9utils <none>
pn ctdb <none>
pn ldb-tools <none>
ii ntp 1:4.2.8p13+dfsg-2
pn smbldap-tools <none>
pn ufw <none>
pn winbind <none>
-- no debconf information
-------------- next part --------------
#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
# - When such options are commented with ";", the proposed setting
# differs from the default Samba behaviour
# - When commented with "#", the proposed setting is the default
# behaviour of Samba but the option is considered important
# enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic
# errors.
#======================= Global Settings =======================
[global]
dos charset = 866
unix charset = UTF8
message command = sh -c 'DISPLAY=:0 zenity --text-info --title="Net message" --filename %s &'
## Browsing/Identification ###
# Change this to the workgroup/NT-domain name your Samba server will part of
workgroup = USVGROUP
#### Networking ####
# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
; interfaces = 127.0.0.0/8 eth0
# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself. However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
; bind interfaces only = yes
#### Debugging/Accounting ####
# This tells Samba to use a separate log file for each machine
# that connects
log file = /var/log/samba/log.%m
# Cap the size of the individual log files (in KiB).
max log size = 1000
# We want Samba to only log to /var/log/samba/log.{smbd,nmbd}.
# Append syslog at 1 if you want important messages to be sent to syslog too.
logging = file
# Do something sensible when Samba crashes: mail the admin a backtrace
panic action = /usr/share/samba/panic-action %d
####### Authentication #######
# Server role. Defines in which mode Samba will operate. Possible
# values are "standalone server", "member server", "classic primary
# domain controller", "classic backup domain controller", "active
# directory domain controller".
#
# Most people will want "standalone server" or "member server".
# Running as "active directory domain controller" will require first
# running "samba-tool domain provision" to wipe databases and create a
# new domain.
server role = standalone server
obey pam restrictions = yes
# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
unix password sync = yes
# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan at informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
pam password change = yes
# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
map to guest = bad user
########## Domains ###########
#
# The following settings only takes effect if 'server role = primary
# classic domain controller', 'server role = backup domain controller'
# or 'domain logons' is set
#
# It specifies the location of the user's
# profile directory from the client point of view) The following
# required a [profiles] share to be setup on the samba server (see
# below)
; logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
# logon path = \\%N\%U\profile
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
; logon drive = H:
# logon home = \\%N\%U
# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
; logon script = logon.cmd
# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe. The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u
# This allows machine accounts to be created on the domain controller via the
# SAMR RPC pipe.
# The following assumes a "machines" group exists on the system
; add machine script = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u
# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.
; add group script = /usr/sbin/addgroup --force-badname %g
############ Misc ############
# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
; include = /home/samba/etc/smb.conf.%m
# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
; idmap config * : backend = tdb
; idmap config * : range = 3000-7999
; idmap config YOURDOMAINHERE : backend = tdb
; idmap config YOURDOMAINHERE : range = 100000-999999
; template shell = /bin/bash
# Setup usershare options to enable non-root users to share folders
# with the net usershare command.
# Maximum number of usershare. 0 means that usershare is disabled.
# usershare max shares = 100
# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
usershare allow guests = yes
#======================= Share Definitions =======================
[homes]
comment = Home Directories
browseable = no
# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
read only = yes
# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
create mask = 0700
# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
directory mask = 0700
# By default, \\server\username shares can be connected to by anyone
# with access to the samba server.
# The following parameter makes sure that only "username" can connect
# to \\server\username
# This might need tweaking when using external authentication schemes
valid users = %S
# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
;[netlogon]
; comment = Network Logon Service
; path = /home/samba/netlogon
; guest ok = yes
; read only = yes
# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
; comment = Users profiles
; path = /home/samba/profiles
; guest ok = no
; browseable = no
; create mask = 0600
; directory mask = 0700
[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700
# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace 'lpadmin' with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
; write list = root, @lpadmin
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