Log in issue

Wed Jan 2 10:12:04 GMT 2002

All,

I have a strange issue that I have not been able to pin down to one or
two things that would be causing this. I recently changed the linux box
from an internal IP (192.168) that needed a WINS server added to the
workstations for it to be found to and external IP with no WINS needed.

The issue is that now, the user has trouble logging in. It is not that
they can't, it just takes a few tries. When this happens, I run tcpdump
and do not see their machine hitting the server (not all the time
though). But I can log in the user at my machine, which would leave me
to believe that it is either user error or ??? I have witnessed this
phenom myself where I can not log in as them or myself (to eliminate
user error) but if I restart the machine I can log in as them and
myself.

This is not a technical guess, but it seems as if the workstation
"loses" the server and then finds it again. My server is constantly
getting attacked from within the network and from outside (port sentry)
and I do not know if this is a cause for this issue. But I do know that
the issue did not happen when the server was on the internal IP scheme
with a WINS with a static entry for the linux server. I have looked for
some help, but it is hard to when you do no know where to begin. 

I appreciate all your help.

Cheers,

Tony

Here is the setup: Redhat 7.1 with samba 2.2.3

And Here is my smb.conf:
#======================= Global Settings
=====================================
[global]

# This does not allow the files used in the nimda virus
  veto files = /*.eml/*nws/riched20.dll/
  veto files = /*.{*}/

# This sets the netbios name TR
  netbios name = SIFL

# Never allows guest connection TR
   map to guest = never

# This sets the log level for smb and nmb components TR

  loglevel = 5

# This adds domain admin users TR
  domain admin group =@domain_admin

# This is for printing in a BSD environment TR
  printcap name = /etc/printcap
  printing = bsd

# Tells samba to ignore invalid users TR
  invalid users = nobody

# workgroup = NT -Domain-Name or Workgroup-Name
  workgroup = PMO

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

# This option is important for security. It allows you to restrict
# connections to machines which are on your local network. The
# following example restricts access to two C class networks and
# the "loopback" interface. For more examples of the syntax see
# the smb.conf man page
;   hosts allow = 192.168.1. 192.168.2. 127.

# if you want to automatically load your printer list rather
# than setting them up individually then you'll need this
   printcap name = /etc/printcap
   load printers = yes

# It should not be necessary to spell out the print system type unless
# yours is non-standard. Currently supported print systems include:
# bsd, sysv, plp, lprng, aix, hpux, qnx
   printing = lprng

# Uncomment this if you want a guest account, you must add this to
/etc/passwd
# otherwise the user "nobody" is used
;  guest account = pcguest

# this tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/%m-%I.log

# Put a capping on the size of the log files (in Kb).
   max log size = 50

# 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
# The argument list may include:
#   password server = My_PDC_Name [My_BDC_Name] [My_Next_BDC_Name]
# or to auto-locate the domain controller/s
#   password server = *
;   password server = <NT-Server-Name>

# Password Level allows matching of _n_ characters of the password for
# all combinations of upper and lower case.
  password level = 20
  username level = 20

# 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
   encrypt passwords = yes
   smb passwd file = /etc/samba/smbpasswd

# The following is needed to keep smbclient from spouting spurious
errors
# when Samba is built with support for SSL.
;   ssl CA certFile = /usr/share/ssl/certs/ca-bundle.crt

# The following are needed to allow password changing from Windows to
# update the Linux sytsem password also.
# 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*password* %n\n *Retype*new*password* %n\n
*passwd:*all*authentication*tokens*updated*successfully*

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

# 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 = /etc/samba/smb.conf.%m

# This parameter will control whether or not Samba should obey PAM's
# account and session management directives. The default behavior is
# to use PAM for clear text authentication only and to ignore any
# account or session management. Note that Samba always ignores PAM
# for authentication in the case of encrypt passwords = yes

; obey pam restrictions = yes

# 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

# Configure Samba to use multiple interfaces
# If you have multiple network interfaces then you must list them
# ere. See the man page for details.
; interfaces = 192.168.12.2/24 192.168.13.2/24 
  interfaces = eth1

#  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 = 165.134.134.255 

# Browser Control Options:
# 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 = 64

# 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

# Enable this if you want Samba to be a domain logon server for 
# Windows95 workstations. 
   domain logons = yes

# if you enable domain logons then you may want a per-machine or
# per user logon script
# run a specific logon batch file per workstation (machine)
;   logon script = %m.bat
# run a specific logon batch file per username
   logon script = sluh.bat

# Where to store roving profiles (only for Win95 and WinNT)
#        %L substitutes for this servers netbios name, %U is username
#        You must uncomment the [Profiles] share below
;   logon path = \\%L\Profiles\%U
    logon path = \\%L\Profiles\%U 
# 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 = 165.134.34.200  

# 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 

# 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

#============================ Share Definitions
==============================
[homes]
   comment = Home Directories
  browseable = no
   writable = yes
   create mode = 0664
   directory mode = 0775

#Information System's Folder
[Infosys]
  comment = IS Department's Folder
  browseable = yes
  writable = yes
  valid users = @infosys
  path = /home/infosys
  create mode = 0755
  directory mode = 0755

#Registraton's Folder
[Registration]
  comment = Registration's Folder
  browseable = yes
  writable = yes
  valid users = @registration
  path = /home/registration
  create mode = 0755
  directory mode =  0755

#Trainig's Folder
[Training]
  comment = Training's Folder
  browseable = yes
  writable = yes
  valid users = @training
  path = /home/training
  create mode = 0755
  directory mode =  0755

#Analyst's Folder
[Analyst]
  comment = Analyst's Folder
  browseable = yes
  writable = yes
  valid users = @analyst
  path = /home/analyst
  create mode = 0755
  directory mode =  0755

#Adminstration's Folder
[Admin]
  comment = Adminstration's folder
  browseable = yes
  writable = yes
  valid users =@admin
  path = /home/administration
  create mode = 0755
  directory mode =  0755

#Mdirect Folder
[Mdirect]
  comment = Mdirect Folder
  browseable = yes
  writable = yes
  path = /home/Mdirect
  create mode = 0755
  directory mask = 0755

#A/R Folder
[AR]
  comment = A/R's Folder
  browseable = yes
  writable = yes
  path = /home/AR
  create mode = 0755
  directory mask = 0755
  valid users = @A/R
#Temp
[Temp]
 path = /chester/temp
 writable = yes
 valid users = rickert,temp,noonantp

# If you want users samba doesn't recognize to be mapped to a guest user
; map to guest = bad user

# Un-comment the following and create the netlogon directory for Domain
Logons
  [netlogon]
   comment = Network Logon Service
   path = /usr/local/samba/lib/netlogon
;  guest ok = no
   writable = no
;  share modes = no

# Un-comment the following to provide a specific roving profile share
# the default is to use the user's home directory
[Profiles]
    path = /usr/local/samba/profiles
    browseable = no
;  guest ok = yes

# NOTE: If you have a BSD-style print system there is no need to 
# specifically define each individual printer
[printers]
   comment = All Printers
   path = /var/spool/samba
   browseable = no
   print ok = yes
   print command = /usr/bin/lpr -P%p -r %s
   lpq command = /usr/bin/lpq -P%p
   lprm command = /usr/bin/lprm -P%p %j
   lppause command = /usr/sbin/lpc hold %p %j
   lpresume command = /usr/sbin/lpc release %p %j
   queuepause command = /usr/sbin/lpc -P%p stop
   queueresume command = /usr/sbin/lpc -P%p start