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Thread: Cannot access 8.10 Samba Server, failed authentication

  1. #1
    Join Date
    Nov 2008
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    East Coast USA
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    Ubuntu 8.10 Intrepid Ibex

    Question Cannot access 8.10 Samba Server, failed authentication

    Hello,

    I have an Ubuntu 8.10 desktop (upgraded from 8.04) improperly configured on my LAN. I want to share the attached printer and my home directory. I have added my user account (jay) to the smb database. Every time I try to access the share from a Windows box (XP or Vista), I can connect to the share, but the authentication fails. My user name and password are correct, but the session tries to connect as:

    "WINDOWSPC\jay"

    which, fails

    If I change it to:

    "LINUXPC\jay"

    there is no change. I use the same user account and password on both the Windows and Linux PCs with the same password.

    Below is my smb.conf file:

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

    [global]

    ## Browsing/Identification ###

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

    # server string is the equivalent of the NT Description field
    server string = Samba

    # Windows Internet Name Serving Support Section:
    # WINS Support - Tells the NMBD component of Samba to enable its WINS Server
    wins support = yes

    # 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

    #### 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
    # 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

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

    # If you want to automatically load your printer list rather
    # than setting them up individually then you'll need this
    # load printers = yes

    # 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
    ;[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 = yes
    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 = yes
    # Uncomment to allow remote administration of Windows print drivers.
    # Replace 'ntadmin' with the name of the group your admin users are
    # members of.
    ; write list = root, @ntadmin

    # 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


    I left the settings at their defaults for the most part. Thanks in advance for any help.

  2. #2
    Join Date
    Mar 2006
    Location
    United Kingdom
    Beans
    1,140
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Cannot access 8.10 Samba Server, failed authentication

    # 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
    I have often had difficulty with this so I have commented this line out on my systems allowing me open my linux shares without being prompted for a user name or password. However, if you do not feel comfortable with this (from a secutity point of view), I believe you need to use the smbpasswd utility to set up a Samba password to access it from Windows. It would be used thusly:

    sudo smbpasswd [username]
    You would then be prompted to type in the new password and retype it. Haven't used this in a long time, but this is how I used to do it.
    Bob
    _____________________________________________
    I used to be very indecisive, but now I am not so sure.

  3. #3
    Join Date
    Nov 2008
    Location
    East Coast USA
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    Ubuntu 8.10 Intrepid Ibex

    Re: Cannot access 8.10 Samba Server, failed authentication

    Hello,

    The suggested settings did not work. I tried making an SMB connection from my Mac and the same result occurred, "User does not have permission to access the server". My account is the only one on the server...

    How would one access a printer this way? Authenticate every time?

    Thanks

  4. #4
    Join Date
    Nov 2008
    Location
    East Coast USA
    Beans
    Hidden!
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Re: Cannot access 8.10 Samba Server, failed authentication

    I was able to get this working by, well I am not exactly sure how, but I followed the tutorial in the link below.

    http://www.howtoforge.com/ubuntu-home-fileserver

    The creation of a public share was the only real change I made. Weird...

    I wish I knew the answer.

    Thanks!

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