Server keeps dropping network connections

Discussion in 'Linux & BSD' started by unknownsoul, Oct 7, 2009.

  1. unknownsoul

    unknownsoul Moderator

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    Location:
    Fort Worth, Texas
    Hey guys,
    To start with, I have a Dell PowerEdge R710 running Ubuntu Server 8.04 LTS.
    I have Apache2, Samba, and openssh running on the computer right now.
    I have samba shares that I can get to from different computers on the network (both Vista and XP).
    However, I keep losing connection at random times (several times an hour) with the shares I setup for them.
    I never lose ssh connection though.
    Any ideas?

    Here's a portion of my daemon.log

    Oct 7 11:58:33 Server smbd[29880]: create_builtin_users: Failed to create Users
    Oct 7 12:30:33 Server smbd[29981]: [2009/10/07 12:30:33, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 12:30:33 Server smbd[29981]: create_builtin_administrators: Failed to create Administrators
    Oct 7 12:30:33 Server smbd[29981]: [2009/10/07 12:30:33, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 12:30:33 Server smbd[29981]: create_builtin_users: Failed to create Users
    Oct 7 13:02:33 Server smbd[30082]: [2009/10/07 13:02:33, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:02:33 Server smbd[30082]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:02:33 Server smbd[30082]: [2009/10/07 13:02:33, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:02:33 Server smbd[30082]: create_builtin_users: Failed to create Users
    Oct 7 13:13:44 Server smbd[30247]: [2009/10/07 13:13:44, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:13:44 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:13:44 Server smbd[30247]: [2009/10/07 13:13:44, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:13:44 Server smbd[30247]: create_builtin_users: Failed to create Users
    Oct 7 13:13:48 Server smbd[30247]: [2009/10/07 13:13:48, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:13:48 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:13:48 Server smbd[30247]: [2009/10/07 13:13:48, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:13:48 Server smbd[30247]: create_builtin_users: Failed to create Users
    Oct 7 13:14:06 Server smbd[30247]: [2009/10/07 13:14:06, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:14:06 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:14:06 Server smbd[30247]: [2009/10/07 13:14:06, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:14:06 Server smbd[30247]: create_builtin_users: Failed to create Users


    Here's a portion from the syslog

    Oct 7 13:01:40 Server -- MARK --
    Oct 7 13:02:33 Server smbd[30082]: [2009/10/07 13:02:33, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:02:33 Server smbd[30082]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:02:33 Server smbd[30082]: [2009/10/07 13:02:33, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:02:33 Server smbd[30082]: create_builtin_users: Failed to create Users
    Oct 7 13:09:01 Server /USR/SBIN/CRON[30107]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxli\
    fetime) -print0 | xargs -r -0 rm)
    Oct 7 13:13:44 Server smbd[30247]: [2009/10/07 13:13:44, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:13:44 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:13:44 Server smbd[30247]: [2009/10/07 13:13:44, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:13:44 Server smbd[30247]: create_builtin_users: Failed to create Users
    Oct 7 13:13:48 Server smbd[30247]: [2009/10/07 13:13:48, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:13:48 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:13:48 Server smbd[30247]: [2009/10/07 13:13:48, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:13:48 Server smbd[30247]: create_builtin_users: Failed to create Users
    Oct 7 13:14:06 Server smbd[30247]: [2009/10/07 13:14:06, 0] auth/auth_util.c:create_builtin_administrators(792)
    Oct 7 13:14:06 Server smbd[30247]: create_builtin_administrators: Failed to create Administrators
    Oct 7 13:14:06 Server smbd[30247]: [2009/10/07 13:14:06, 0] auth/auth_util.c:create_builtin_users(758)
    Oct 7 13:14:06 Server smbd[30247]: create_builtin_users: Failed to create Users


    if you need any other information, please let me know.
     
  2. X-Istence

    X-Istence * Political User

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  3. unknownsoul

    unknownsoul Moderator

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    I don't really have a choice as to drop it or not...
    Do you have another alternative besides switching to ftp? thanks in advance.
     
  4. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    lets have a look at your smb.conf
     
    unknownsoul likes this.
  5. unknownsoul

    unknownsoul Moderator

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    Location:
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    [global]

    # 1. Server Naming Options:
    # workgroup = NT-Domain-Name or Workgroup-Name
    workgroup = WORKGROUP

    # netbios name is the name you will see in "Network Neighbourhood",
    # but defaults to your hostname
    netbios name = server

    # server string is the equivalent of the NT Description field
    server string = %h

    # Message command is run by samba when a "popup" message is sent to it.
    # The example below is for use with LinPopUp:
    ; message command = /usr/bin/linpopup "%f" "%m" %s; rm %s

    use sendfile = no
    # 2. Printing Options:
    # CHANGES TO ENABLE PRINTING ON ALL CUPS PRINTERS IN THE NETWORK
    # if you want to automatically load your printer list rather
    # than setting them up individually then you'll need this
    ; printcap name = lpstat
    ; load printers = yes

    smb ports = 139

    # 3. Logging Options:
    # this tells Samba to use a separate log file for each machine
    # that connects
    log file = /var/log/samba/log.%m

    # Put a capping on the size of the log files (in Kb).
    max log size = 500

    # Set the log (verbosity) level (0 <= log level <= 10)
    log level = 3

    hosts allow = 192.168.1. 127.

    # Security mode. Most people will want user level security. See
    # security_level.txt for details.
    security = user

    # Use password server option only with security = server or security = domain
    # When using security = domain, you should use password server = *
    ; password server = <NT-Server-Name>
    ; password server = *

    # Password Level allows matching of _n_ characters of the password for
    # all combinations of upper and lower case.
    ; password level = 8
    ; username level = 8

    # You may wish to use password encryption. Please read
    # ENCRYPTION.txt, Win95.txt and WinNT.txt in the Samba documentation.
    # Do not enable this option unless you have read those documents
    # Encrypted passwords are required for any use of samba in a Windows NT domain
    # The smbpasswd file is only required by a server doing authentication, thus
    # members of a domain do not need one.
    encrypt passwords = yes
    smb passwd file = /etc/samba/private/smbpasswd

    # The following are needed to allow password changing from Windows to
    # also update the Linux system password.
    # NOTE: Use these with 'encrypt passwords' and 'smb passwd file' above.
    # NOTE2: You do NOT need these to allow workstations to change only
    # the encrypted SMB passwords. They allow the Unix password
    # to be kept in sync with the SMB password.
    unix password sync = Yes
    passwd program = /usr/bin/passwd %u
    passwd chat = *New*UNIX*password* %n\n *ReType*new*UNIX*password* %n\n *passwd:*all*authentication*tokens*updated*successfully*

    # Unix users can map to different SMB User names
    username map = /etc/samba/smbusers

    # Options for using winbind. Winbind allows you to do all account and
    # authentication from a Windows or samba domain controller, creating
    # accounts on the fly, and maintaining a mapping of Windows RIDs to unix uid's
    # and gid's. winbind uid and winbind gid are the only required parameters.
    #
    # winbind uid is the range of uid's winbind can use when mapping RIDs to uid's
    ; winbind uid = 10000-20000
    #
    # winbind gid is the range of uid's winbind can use when mapping RIDs to gid's
    ; winbind gid = 10000-20000
    #
    # winbind separator is the character a user must use between their domain
    # name and username, defaults to "\"
    ; winbind separator = +
    #
    # template homedir determines the home directory for winbind users, with
    # %D expanding to their domain name and %U expanding to their username:
    ; template homedir = /home/%D/%U
    #
    # template shell determines the shell users authenticated by winbind get
    ; template shell = /bin/bash

    # 5. Browser Control and Networking Options:
    # Most people will find that this option gives better performance.
    # See speed.txt and the manual pages for details
    # socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
    socket options = SO_KEEPALIVE IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=65536 SO_RCVBUF=65536

    # Configure Samba to use multiple interfaces
    # If you have multiple network interfaces then you must list them
    # here. See the man page for details.
    ; interfaces = 192.168.12.2/24 192.168.13.2/24

    # Configure remote browse list synchronisation here
    # request announcement to, or browse list sync from:
    # a specific host or from / to a whole subnet (see below)
    ; remote browse sync = 192.168.3.25 192.168.5.255
    # Cause this host to announce itself to local subnets here
    ; remote announce = 192.168.1.255 192.168.2.44

    # set local master to no if you don't want Samba to become a master
    # browser on your network. Otherwise the normal election rules apply
    local master = yes

    # OS Level determines the precedence of this server in master browser
    # elections. The default value should be reasonable
    os level = 67

    # Domain Master specifies Samba to be the Domain Master Browser. This
    # allows Samba to collate browse lists between subnets. Don't use this
    # if you already have a Windows NT domain controller doing this job
    # domain master = yes

    # Preferred Master causes Samba to force a local browser election on startup
    # and gives it a slightly higher chance of winning the election
    preferred master = yes

    add user script = /usr/sbin/useradd -s /bin/false '%u'
    add machine script = /usr/sbin/useradd -d /dev/null -g machines -c 'Machine Account' -s /bin/false %u

    # Script for domain member for adding local accounts for authenticated users:
    ; add user script = /usr/sbin/useradd -s /bin/false %u

    # Domain groups:
    # domain admin group is a list of unix users or groups who are made members
    # of the Domain Admin group
    #domain admin group = root @wheel
    admin users = root @administratorx

    #
    # domain guest groups is a list of unix users or groups who are made members
    # of the Domain Guests group
    ; domain guest group = nobody @guest

    # 7. Name Resolution Options:
    # All NetBIOS names must be resolved to IP Addresses
    # 'Name Resolve Order' allows the named resolution mechanism to be specified
    # the default order is "host lmhosts wins bcast". "host" means use the unix
    # system gethostbyname() function call that will use either /etc/hosts OR
    # DNS or NIS depending on the settings of /etc/host.config, /etc/nsswitch.conf
    # and the /etc/resolv.conf file. "host" therefore is system configuration
    # dependant. This parameter is most often of use to prevent DNS lookups
    # in order to resolve NetBIOS names to IP Addresses. Use with care!
    # The example below excludes use of name resolution for machines that are NOT
    # on the local network segment
    # - OR - are not deliberately to be known via lmhosts or via WINS.
    ; name resolve order = wins lmhosts bcast

    # Windows Internet Name Serving Support Section:
    # WINS Support - Tells the NMBD component of Samba to enable it's 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

    # WINS Proxy - Tells Samba to answer name resolution queries on
    # behalf of a non WINS capable client, for this to work there must be
    # at least one WINS Server on the network. The default is NO.
    ; wins proxy = yes

    # DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names
    # via DNS nslookups. The built-in default for versions 1.9.17 is yes,
    # this has been changed in version 1.9.18 to no.
    dns proxy = no

    # 8. File Naming Options:
    # Case Preservation can be handy - system default is _no_
    # NOTE: These can be set on a per share basis
    ; preserve case = no
    ; short preserve case = no
    # Default case is normally upper case for all DOS files
    ; default case = lower
    # Be very careful with case sensitivity - it can break things!
    ; case sensitive = no

    kernel oplocks = no


    #============================ Share Definitions ==============================
    [homes]
    comment = Home Directories
    browseable = no
    writable = yes
    create mask = 0775
    directory mask = 0775
    veto files = /*Maildir*/.*/
    #veto files = .procmailrc

    [ccfw]
    comment = ccfw
    path = /var/data/samba/ccfw
    public = yes
    writable = yes
    guest ok = yes
    create mask = 0770
    force create mode = 0770
    security mask = 0770
    directory mode = 0770
    force group = ccfw
    read only = no
    oplocks = no
    valid users = @ccfw
    #level 2 oplocks = no
    force create mode = 0770
    force directory mode = 0770
    [lnf]
    comment = lnf
    path = /var/data/samba/lnf
    public = yes
    writable = yes
    guest ok = yes
    create mask = 0770
    force create mode = 0770
    security mask = 0770
    directory mode = 0770
    force group = lnf
    read only = no
    oplocks = no
    valid users = @lnf
    #level 2 oplocks = no
    force create mode = 0770
    force directory mode = 0770

    [pastor]
    comment = pastor
    path = /var/data/samba/pastor
    public = yes
    writable = yes
    guest ok = yes
    create mask = 0770
    force create mode = 0770
    security mask = 0770
    directory mode = 0770
    force group = pastor
    read only = no
    oplocks = no
    valid users = @pastor
    #level 2 oplocks = no
    force create mode = 0770
    force directory mode = 0770

    # A publicly accessible directory, read/write to all users. Note that all files
    # created in the directory by users will be owned by the default user, so
    # any user with access can delete any other user's files. Obviously this
    # directory must be writable by the default user. Another user could of course
    # be specified, in which case all files would be owned by that user instead.
    [public]
    path = /var/data/samba
    public = yes
    only guest = yes
    writable = yes
    printable = no
     
  6. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    socket options = SO_KEEPALIVE IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=65536 SO_RCVBUF=65536

    that looks abnormally high to me, i would try dropping it to the standard 8192 , if all works ok you can try upping it to 16384.

    Here is my old smb.conf (no need now i only have 1 pc)

    Code:
    [global]
    workgroup = SECTION9
    server string = Samba Server %v
    printcap name = cups
    printing = cups
    load printers = yes
    log file = /var/log/samba/log.%m
    max log size = 50
    socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
    interfaces = lo eth0
    bind interfaces only = yes
    hosts allow = 127.0.0.1 192.168.1.0/24
    hosts deny = 0.0.0.0/0
    security = user
    guest ok = no
    
    [print$]
    comment = Printer Drivers
    path = /etc/samba/printer
    guest ok = yes
    browseable = yes
    read only = yes
    write list = root
    
    
    [HPDeskJet930C]
    comment = HP DeskJet 930C Network Printer
    printable = yes
    path = /var/spool/samba
    public = yes
    guest ok = yes
    printer admin = root
    
    
    [printers]
    comment = All Printers
    browseable = no
    printable = yes
    writable = no
    public = yes
    guest ok = yes
    path = /var/spool/samba
    printer admin = root
    
    [myfiles]
    comment = My Files
    browseable = yes
    writable = yes
    public = no
    create mask = 0644
    directory mask = 0755
    guest ok = no
    path = /home/user
    
    Basic i know but it works, you could try something like this and see if your issues still remain, if so then there is something else a foot, if it does work then its a setting within your samba that has started to get upset
     
  7. unknownsoul

    unknownsoul Moderator

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    I'll try that this afternoon, thanks!
     
  8. stevebroome

    stevebroome OSNN One Post Wonder

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    Unknownsoul,

    I have had the same scenario for about two weeks and just found my solution. When i as on my vista computer, my file shares would be working perfectly. I could step away for a few minutes or overnight and suddenly they disappear when i click on network. I could reboot the computers, reload the smb.conf file and sometimes it would show back up and sometimes it would not. I have wrestled with samba for about 3 weeks now and understand it a lot better now. Here's what worked for me:

    In your smb.conf file, you have the netbios name = server. I also had to add the following option:

    wins support = yes

    As long as I use the netbios name AND wins support options, I do not have a problem with vista losing connectivity with my samba shares. If I were to comment out these two optioins, of course my computer shows up as my computer name, instead of the netbios name when looking from vista. And that's when I have problems.

    I'm not real familar with exactly what these two settins do, as far as understanding them technically speaking, but give this a try. Add this option in the [Golbals] section right under your netbios entry. Let me know if this works..

    Steve
     
  9. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    he has both options enabled on his system and still he gets the error
     
  10. unknownsoul

    unknownsoul Moderator

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    I put the change in, and I'll give it a few hours to see how it does. Thanks for the help!
     
  11. unknownsoul

    unknownsoul Moderator

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    It's no good. It keeps dropping.
     
  12. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    is there anything windows event log that might explain any drop outs
     
  13. unknownsoul

    unknownsoul Moderator

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    Not sure. I'll take a look at it and let you know.
     
  14. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    i get an annoying issue on mac whereby if the thing goes to sleep when it wakes up i cant connect to a windows share unless i reboot the mac :/
     
  15. X-Istence

    X-Istence * Political User

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    Never have I had that issue.