Create User Authenticated Samba Share

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Tuxedo
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Create User Authenticated Samba Share

Postby Tuxedo » Wed Sep 02, 2009 10:32 pm

By default TonidoPlug is not configured to provide user based access to samba shares.
Here is a guide to provide user based access.
By doing this setup, users can access their home directories by authenticating themselves with their login and password. They cannot view or access other user shares without their login credentials.
By default when an user is created in the linux OS, it is not available as a samba user automatically. This usually is done as a separate step. In our setup we automate this process.

Setup
1. Install libpam-smbpass package. This package provides necessary tools to synchronize linux OS user/passwords with samba repository.

Code: Select all

apt-get install libpam-smbpass


2. Open /etc/samba/smb.conf with a text editor and make the following changes.

3. By default TonidoPlug allows full access to everybody. Disable this default behavior. Look for the following lines and comment them.

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# What naming service and in what order should we use to resolve host names
# to IP addresses
;   name resolve order = lmhosts host wins bcast
;   force user = root
;   force group = root

;   guest ok = yes
;   browseable = yes
;   public = yes
;   writable = yes

The above lines shows the commented configuration lines

4. By default TonidoPlug allows share level access. Change this to user level access.
Look for line "security = share" and change it as follows

Code: Select all

# "security = user" is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
   security = user


5. Enable automatic synchronization of user and password information from linux OS to samba.

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# 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


6. We need to users to access their home directories when they login with userid and password. Samba configuration should be enabled to expose user home directories.

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# Un-comment the following (and tweak the other settings below to suit)
# to enable the default home directory shares.  This will share each
# user's home directory as \server\username
[homes]
   comment = Home Directories
   browseable = yes

# 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 = no

# 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.  Un-comment the following parameter
# to make sure that only "username" can connect to \server\username
# This might need tweaking when using external authentication schemes
   valid users = %S


7. Save the smb.conf file and restart samba daemon.

Code: Select all

 # /etc/init.d/samba restart


Test
For testing, we will create a user on the TonidoPlug and try to access the user's home directory as a samba share.

1. Create a user on TonidoPlug. You can do this by doing SSH to TonidoPlug as root user.

Code: Select all

 # useradd -m -k /etc/skel demouser


2. Set a password for the demouser.

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 # passwd demouser


3. Important: Open another SSH session to TonidoPlug and login as the new user. This is only trigger I could find to synchronize the OS user details with samba.
You can close the SSH session as soon as login is successful.

4. For the other SSH session (as root user) verify if the new linux user is synchronized with samba.

Code: Select all

 pdbedit -w -L
nobody:65534:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:[U          ]:LCT-00000000:
root:0:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:0708DD6BC4B608A64FC970497CC6F7AD:[U          ]:LCT-4A09E411:
demouser:1001:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:A827E65ED0E8EA4B14721624A19DE519:[U          ]:LCT-4A9E8E33:

You should see 'demouser' as an entry in the output.

5. Now from the windows machine, open an explorer window and type the \\<Tonido_Plug_IP>\demouser. It should prompt for username and password. Enter 'demouser' and its password. Once you click 'Ok' it should show the demouser's home directory with full access only to his home directory.

alex_ncus
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Re: Create User Authenticated Samba Share

Postby alex_ncus » Tue Sep 08, 2009 3:28 pm

Excellent writeup! Thank you.

Question: doesn't this create the home directory on the TonidoPlug flash drive (rather than the intended USB drive)?

I added the following in the [homes] section to point to the USB drive:

Code: Select all

path=/media/usb0/%S


You'll also need to 'mkdir /media/usb0/demouser' to create the directory to store your files.

pealmasa
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Re: Create User Authenticated Samba Share

Postby pealmasa » Tue Oct 26, 2010 4:13 pm

I could use some help on this. I followed the procedures you give and I have an error on install the package:

root@TonidoPlug:~# apt-get install libpam-smbpass
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libcap2 libpam-runtime samba samba-common
Suggested packages:
openbsd-inetd inet-superserver smbldap-tools ldb-tools ufw
The following NEW packages will be installed:
libcap2 libpam-smbpass
The following packages will be upgraded:
libpam-runtime samba samba-common
3 upgraded, 2 newly installed, 0 to remove and 85 not upgraded.
E: Could not open lock file /var/cache/apt/archives/lock - open (2 No such file or directory)
E: Unable to lock the download directory

Anyway, I went on configuring the rest of the procedures and when I SSH with the recently created user logon I get kicked from SSH.
And when I command:
pdbedit -w -L

The user I created doesn't appear

Any ideas?
Tks

pealmasa
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Re: Create User Authenticated Samba Share

Postby pealmasa » Tue Oct 26, 2010 4:38 pm

OK I got it! Just manually created the missing dirs.
Everything ok now.


pealmasa wrote:I could use some help on this. I followed the procedures you give and I have an error on install the package:

root@TonidoPlug:~# apt-get install libpam-smbpass
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libcap2 libpam-runtime samba samba-common
Suggested packages:
openbsd-inetd inet-superserver smbldap-tools ldb-tools ufw
The following NEW packages will be installed:
libcap2 libpam-smbpass
The following packages will be upgraded:
libpam-runtime samba samba-common
3 upgraded, 2 newly installed, 0 to remove and 85 not upgraded.
E: Could not open lock file /var/cache/apt/archives/lock - open (2 No such file or directory)
E: Unable to lock the download directory

Anyway, I went on configuring the rest of the procedures and when I SSH with the recently created user logon I get kicked from SSH.
And when I command:
pdbedit -w -L

The user I created doesn't appear

Any ideas?
Tks

RomanH
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Re: Create User Authenticated Samba Share

Postby RomanH » Wed Nov 17, 2010 3:26 pm

I've succesfully followed all of Tuxedo's steps (incl. creating the two directories, as pealmasa did). I can now connect from Windows and Ubuntu computers to my Tonidoplug via Samba by loging in as the newly created user. I can see my home directory and the content of the USB stick connected to my plug. However, I can only read the content. I cannot write on my USB stick since over Samba since I do not have the rights to do that. What's the best way to solve this problem? How can I give myself writing privileges outside my home directory?

thanks!

RomanH

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Re: Create User Authenticated Samba Share

Postby RomanH » Fri Nov 19, 2010 12:45 pm

ah, found the solution

just added
write list = [list of all the users that should be allowed to write]
e.g.
write list = Peter Paul Mary

to the section [disk1part1] at the end of the file.

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agrajag
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Re: Create User Authenticated Samba Share

Postby agrajag » Fri Mar 04, 2011 3:39 am

try this:

Code: Select all

nano /etc/samba/smb.conf

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madhan
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Re: Create User Authenticated Samba Share

Postby madhan » Fri Mar 04, 2011 8:22 am

It appears your plug is unable to connect to the Ubuntu archives. Is your connection ok?

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Re: Create User Authenticated Samba Share

Postby madhan » Sat Mar 05, 2011 11:26 am

Please open a new forum post to discuss this issue.
We don't support installing new packages on the plug, so if your reflash doesn't work you might brick your plug.

MaLaCoiD
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Re: Create User Authenticated Samba Share

Postby MaLaCoiD » Fri Jan 06, 2012 1:28 am

I had a bit of trouble getting this working on my TP2. Now it's working great on a Win7 client after following the instructions very carefully.

I installed libpam-smbpass as libpam-samba wasn't a valid package to specify.
I also disabled NTLMv2's 128 bit requirement- not sure if necessary:
Control Panel > Administrative Tools > Local Security Policy > Local Policies > Security Options:
Network security LAN Manager authentication level = Send LM & NTLM responses
Minimum session security for NTLM SSP [client|server] = Disable Require 128-bit encryption
http://www.tomshardware.com/forum/75-63 ... amba-issue

Here's my working config:
$ cat /etc/samba/smb.conf
#
# 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.
# A well-established practice is to name the original file
# "smb.conf.master" and create the "real" config file with
# testparm -s smb.conf.master >smb.conf
# This minimizes the size of the really used smb.conf file
# which, according to the Samba Team, impacts performance
# However, use this with caution if your smb.conf file contains nested
# "include" statements. See Debian bug #483187 for a case
# where using a master file is not a good idea.
#

#======================= Global Settings =======================

[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
workgroup = TONIDO

# server string is the equivalent of the NT Description field
server string = %h server (Samba, Ubuntu)

# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
# wins support = no

# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
; wins server = w.x.y.z

# This will prevent nmbd to search for NetBIOS names through DNS.
dns proxy = no

# What naming service and in what order should we use to resolve host names
# to IP addresses
; name resolve order = lmhosts host wins bcast
; force user = root
; force group = root
; guest ok = yes
; browseable = yes
; public = yes
; writable = yes
unix extensions = no

#### 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

# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
# syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# "security = user" is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
security = user

# You may wish to use password encryption. See the section on
# 'encrypt passwords' in the smb.conf(5) manpage before enabling.
encrypt passwords = true

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
passdb backend = tdbsam

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@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 ###########

# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the 'domain master' setting to no
#
; domain logons = yes
#
# The following setting only takes effect if '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

########## Printing ##########

# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
load printers = no

# lpr(ng) printing. You may wish to override the location of the
# printcap file
; printing = bsd
; printcap name = /etc/printcap

# CUPS printing. See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
; printing = cups
; printcap name = cups

############ 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

# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
# SO_RCVBUF=8192 SO_SNDBUF=8192
# socket options = TCP_NODELAY

# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
; message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s' &

# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to 'no'; otherwise, the default behavior is recommended.
# domain master = auto

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
; idmap uid = 10000-20000
; idmap gid = 10000-20000
; template shell = /bin/bash

# The following was the default behaviour in sarge,
# but samba upstream reverted the default because it might induce
# performance issues in large organizations.
# See Debian bug #368251 for some of the consequences of *not*
# having this setting and smb.conf(5) for details.
; winbind enum groups = yes
; winbind enum users = yes

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.

# Maximum number of usershare. 0 (default) 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 =======================

# Un-comment the following (and tweak the other settings below to suit)
# to enable the default home directory shares. This will share each
# user's home directory as \server\username
[homes]
comment = Home Directories
browseable = yes

# 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 = no

# 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. Un-comment the following parameter
# to make 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
; share modes = no

# 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

# Windows clients look for this share name as a source of downloadable
# printer drivers
# 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

# A sample share for sharing your CD-ROM with others.
;[cdrom]
; comment = Samba server's CD-ROM
; read only = yes
; locking = no
; path = /cdrom
; guest ok = yes

# The next two parameters show how to auto-mount a CD-ROM when the
# cdrom share is accesed. For this to work /etc/fstab must contain
# an entry like this:
#
# /dev/scd0 /cdrom iso9660 defaults,noauto,ro,user 0 0
#
# The CD-ROM gets unmounted automatically after the connection to the
#
# If you don't want to use auto-mounting/unmounting make sure the CD
# is mounted on /cdrom
#
; preexec = /bin/mount /cdrom
; postexec = /bin/umount /cdrom
[printers]
comment=All Printers
path=/var/spool/samba
[print$]
comment=Printer Drivers
path=/var/lib/samba/printers


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