Linux Mail Server Setup and Howto Guide

my smb.conf file

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

[global]
#–authconfig–start-line–

# Generated by authconfig on 2010/06/08 11:56:32
# DO NOT EDIT THIS SECTION (delimited by –start-line–/–end-line–)
# Any modification may be deleted or altered by authconfig in future

   workgroup = saudivalves
   password server = test.saudivalves.com
   realm = saudivalves.com    

   security = ads
   idmap uid = 16777216-33554431
   idmap gid = 16777216-33554431
   template shell = /bin/bash
   winbind use default domain = yes
   winbind offline logon = false

#–authconfig–end-line–

winbind enum users = yes
winbind enum groups = yes
obey pam restrictions = yes
allow trusted domains = no
idmap backend = idmap_rid:saudivalves=16777216-33554431

# ———————– Network Related Options ————————-
#
# workgroup = NT-Domain-Name or Workgroup-Name, eg: MIDEARTH
#
# server string is the equivalent of the NT Description field
#
# netbios name can be used to specify a server name not tied to the hostname
#
# Interfaces lets you configure Samba to use multiple interfaces
# If you have multiple network interfaces then you can list the ones
# you want to listen on (never omit localhost)
#
# Hosts Allow/Hosts Deny lets you restrict who can connect, and you can
# specifiy it as a per share option as well
#
;    workgroup = MYGROUP
    server string = Samba Server Version %v

;    netbios name = MYSERVER

;    interfaces = lo eth0 192.168.12.2/24 192.168.13.2/24
;    hosts allow = 127. 192.168.12. 192.168.13.

# ————————— Logging Options —————————–
#
# Log File let you specify where to put logs and how to split them up.
#
# Max Log Size let you specify the max size log files should reach

    # logs split per machine
;    log file = /var/log/samba/%m.log
    # max 50KB per log file, then rotate
;    max log size = 50

# ———————– Standalone Server Options ————————
#
# Security can be set to user, share(deprecated) or server(deprecated)
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.

;    security = user
    passdb backend = tdbsam

# ———————– Domain Members Options ————————
#
# Security must be set to domain or ads
#
# Use the realm option only with security = ads
# Specifies the Active Directory realm the host is part of
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.
#
# Use password server option only with security = server or if you can't
# use the DNS to locate Domain Controllers
# 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 = *

;    security = domain
;    passdb backend = tdbsam
;    realm = MY_REALM

;    password server = <NT-Server-Name>

# ———————– Domain Controller Options ————————
#
# Security must be set to user for domain controllers
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.
#
# 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 Logons let Samba be a domain logon server for Windows workstations.
#
# Logon Scrpit let yuou specify a script to be run at login time on the client
# You need to provide it in a share called NETLOGON
#
# Logon Path let you specify where user profiles are stored (UNC path)
#
# Various scripts can be used on a domain controller or stand-alone
# machine to add or delete corresponding unix accounts
#
;    security = user
;    passdb backend = tdbsam

;    domain master = yes
;    domain logons = yes

    # the login script name depends on the machine name
;    logon script = %m.bat
    # the login script name depends on the unix user used
;    logon script = %u.bat
;    logon path = \%LProfiles%u
    # disables profiles support by specifing an empty path
;    logon path =  

;    add user script = /usr/sbin/useradd "%u" -n -g users
;    add group script = /usr/sbin/groupadd "%g"
;    add machine script = /usr/sbin/useradd -n -c "Workstation (%u)" -M -d /nohome -s /bin/false "%u"
;    delete user script = /usr/sbin/userdel "%u"
;    delete user from group script = /usr/sbin/userdel "%u" "%g"
;    delete group script = /usr/sbin/groupdel "%g"

# ———————– 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
#
# OS Level determines the precedence of this server in master browser
# elections. The default value should be reasonable
#
# Preferred Master causes Samba to force a local browser election on startup
# and gives it a slightly higher chance of winning the election
;    local master = no
;    os level = 33
;    preferred master = yes

#—————————– Name Resolution ——————————-
# Windows Internet Name Serving Support Section:
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
#
# – WINS Support: Tells the NMBD component of Samba to enable it's WINS Server
#
# – WINS Server: Tells the NMBD components of Samba to be a WINS Client
#
# – 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.
#
# DNS Proxy – tells Samba whether or not to try to resolve NetBIOS names
# via DNS nslookups.

;    wins support = yes
;    wins server = w.x.y.z
;    wins proxy = yes

;    dns proxy = yes

# ————————— Printing Options —————————–
#
# Load Printers let you load automatically the list of printers rather
# than setting them up individually
#
# Cups Options let you pass the cups libs custom options, setting it to raw
# for example will let you use drivers on your Windows clients
#
# Printcap Name let you specify an alternative printcap file
#
# You can choose a non default printing system using the Printing option

    load printers = yes
    cups options = raw

;    printcap name = /etc/printcap
    #obtain list of printers automatically on SystemV
;    printcap name = lpstat
;    printing = cups

# ————————— Filesystem Options —————————
#
# The following options can be uncommented if the filesystem supports
# Extended Attributes and they are enabled (usually by the mount option
# user_xattr). Thess options will let the admin store the DOS attributes
# in an EA and make samba not mess with the permission bits.
#
# Note: these options can also be set just per share, setting them in global
# makes them the default for all shares

;    map archive = no
;    map hidden = no
;    map read only = no
;    map system = no
;    store dos attributes = yes

#============================ Share Definitions ==============================

[homes]
    comment = Home Directories
    browseable = no
    writable = yes
;    valid users = %S
;    valid users = MYDOMAIN%S

[printers]
    comment = All Printers
    path = /var/spool/samba
    browseable = no
    guest ok = no
    writable = no
    printable = yes

# Un-comment the following and create the netlogon directory for Domain Logons
;    [netlogon]
;    comment = Network Logon Service
;    path = /var/lib/samba/netlogon
;    guest ok = yes
;    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 = /var/lib/samba/profiles
;    browseable = no
;    guest ok = yes

# A publicly accessible directory, but read only, except for people in
# the "staff" group
;    [public]
;    comment = Public Stuff
;    path = /home/samba
;    public = yes
;    writable = yes
;    printable = no
;    write list = +staff

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[root@centos ~]# service winbind restart

Shutting down Winbind services:                            [  OK  ]
Starting Winbind services:                                 [  OK  ]
[root@centos ~]# service oddjobd restart
Shutting down oddjobd:                                     [FAILED]
Starting oddjobd:                                          [  OK  ]
[root@centos ~]#

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[root@centos ~]# wbinfo -u
Error looking up domain users

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[root@centos ~]# kinit bugsbunny
kinit(v5): Client not found in Kerberos database while getting initial credentials

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Kindly help me to sort out this problem