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Server keeps dropping network connections

#1
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.
 
#5
[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
 

Dark Atheist

Moderator
Staff member
Political User
#6
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
 

stevebroome

OSNN One Post Wonder
#8
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
 

Dark Atheist

Moderator
Staff member
Political User
#14
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 :/
 

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