Zimbra Samba ext - no machine accounts

[mainframe]

I've been following the http://wiki.zimbra.com/index.php?tit...imbra_Admin_UI howto and got all working exept joining machines into domain. I have granted 'SeAddUsersPrivilege SeMachineAccountPrivilege' to the 'Domain Admins' group - but when joining machine to the domain with user in 'Domain Admins' group I can see from slapd log that it searches for machine account but it's not there - so joining fails. How this machine account should be created - frankly I'm a bit confused as this howto smb.conf has the following line -
'add machine script = /usr/sbin/adduser --shell /bin/false --disabled-password --quiet --gecos "machine account" --force-badname %u' - this is for adding machine account into local passwd not ldap, right? So how the machine account should get created at all?

Tried manually 'smbpasswd -a -m machinename' - but that gives an error too as it searches ldap for already existing machinename to change passwd. Strange that it doesn't add anything before doing search.

Adding Zimbra user as Samba Workstation Trust account will put it under ou=people not machines - so that won't do either.

Am I missing something here?

[mainframe]

As this official howto was written using Ubuntu setup and I used CentOS 5 instead - well it turned out that smb.conf 'add machine script' value should be a bit different for RHEL systems for it to work. Changing this line worked for me:

add machine script = /usr/sbin/useradd -d /var/lib/nobody -g 100 -s /bin/false -M %u

Also I believe the 'add user script' has to be changed as well for it to work.

[pbruna]

mainframe,
i did no try adding a machine yet, but i do have a question?
when you add a machine, from the windows client, this machine account is created in the zimbra ldap or in the CentOS 5 /etc/passwd file?

thanks

[mainframe]

Originally Posted by pbruna

mainframe,
i did no try adding a machine yet, but i do have a question?
when you add a machine, from the windows client, this machine account is created in the zimbra ldap or in the CentOS 5 /etc/passwd file?

thanks

It does both actually - I can see machine entries in /etc/passwd and in Zimbra LDAP afterwords. I think only ldap part is really needed in our case but it adds also local stuff - must be useradd 'feature' to do it like that.

[fajarpri]

Hello Mainframe,
Thank you for the sharing. I think that is the script I need for my Opensuse too. I will try it tonight.

[jsosic]

Hi to all.
I think that adding machine accounts via useradd command is not OK. If your samba is on the HA cluster like Sun Cluster or RHCS, then accounts will be added to /etc/passwd only. This might be OK for a Samba PDC that is run on a single server node, but generally I don't want to polute system that way.

Machine accounts should be added to LDAP via smbldap-tools. Problem is I can't find information on the internet how to set it up to work with Zimbra LDAP. I get the following error:

[root@node02 ~]# smbldap-useradd -w terminal3$
Could not find base dn, to get next uidNumber at /usr/lib/perl5/vendor_perl/5.8.8/smbldap_tools.pm line 1073.

I'm on CentOS 5. Here is my smbldap.conf:

[root@node02 ~]# cat /etc/smbldap-tools/smbldap.conf
##############################################################################
#
# General Configuration
#
##############################################################################

# Put your own SID. To obtain this number do: "net getlocalsid".
# If not defined, parameter is taking from "net getlocalsid" return
SID=S-1-5-21-94915242-3187215094-145361964

# Domain name the Samba server is in charged.
# If not defined, parameter is taking from smb.conf configuration file
# Ex: sambaDomain="IDEALX-NT"
sambaDomain="MYDOMAIN"

##############################################################################
#
# LDAP Configuration
#
##############################################################################

# Notes: to use to dual ldap servers backend for Samba, you must patch
# Samba with the dual-head patch from IDEALX. If not using this patch
# just use the same server for slaveLDAP and masterLDAP.
# Those two servers declarations can also be used when you have 
# . one master LDAP server where all writing operations must be done
# . one slave LDAP server where all reading operations must be done
#   (typically a replication directory)

# Slave LDAP server
# Ex: slaveLDAP=127.0.0.1
# If not defined, parameter is set to "127.0.0.1"
slaveLDAP="192.168.1.186"

# Slave LDAP port
# If not defined, parameter is set to "389"
slavePort="389"

# Master LDAP server: needed for write operations
# Ex: masterLDAP=127.0.0.1
# If not defined, parameter is set to "127.0.0.1"
masterLDAP="192.168.1.186"

# Master LDAP port
# If not defined, parameter is set to "389"
masterPort="389"

# Use TLS for LDAP
# If set to 1, this option will use start_tls for connection
# (you should also used the port 389)
# If not defined, parameter is set to "1"
ldapTLS="0"

# How to verify the server's certificate (none, optional or require)
# see "man Net::LDAP" in start_tls section for more details
verify="require"

# CA certificate
# see "man Net::LDAP" in start_tls section for more details
cafile="/etc/pki/tls/certs/ldapserverca.pem"

# certificate to use to connect to the ldap server
# see "man Net::LDAP" in start_tls section for more details
clientcert="/etc/pki/tls/certs/ldapclient.pem"

# key certificate to use to connect to the ldap server
# see "man Net::LDAP" in start_tls section for more details
clientkey="/etc/pki/tls/certs/ldapclientkey.pem"

# LDAP Suffix
# Ex: suffix=dc=IDEALX,dc=ORG
suffix="dc=company,dc=com"

# Where are stored Users
# Ex: usersdn="ou=Users,dc=IDEALX,dc=ORG"
# Warning: if 'suffix' is not set here, you must set the full dn for usersdn
usersdn="ou=people,dc=zimbra,${suffix}"

# Where are stored Computers
# Ex: computersdn="ou=Computers,dc=IDEALX,dc=ORG"
# Warning: if 'suffix' is not set here, you must set the full dn for computersdn
computersdn="ou=machines,${suffix}"

# Where are stored Groups
# Ex: groupsdn="ou=Groups,dc=IDEALX,dc=ORG"
# Warning: if 'suffix' is not set here, you must set the full dn for groupsdn
groupsdn="ou=group,${suffix}"

# Where are stored Idmap entries (used if samba is a domain member server)
# Ex: idmapdn="ou=Idmap,dc=IDEALX,dc=ORG"
# Warning: if 'suffix' is not set here, you must set the full dn for idmapdn
idmapdn="ou=Idmap,${suffix}"

# Where to store next uidNumber and gidNumber available for new users and groups
# If not defined, entries are stored in sambaDomainName object.
# Ex: sambaUnixIdPooldn="sambaDomainName=${sambaDomain},${suffix}"
# Ex: sambaUnixIdPooldn="cn=NextFreeUnixId,${suffix}"
sambaUnixIdPooldn="sambaDomainName=${sambaDomain},${suffix}"

# Default scope Used
scope="sub"

# Unix password encryption (CRYPT, MD5, SMD5, SSHA, SHA, CLEARTEXT)
hash_encrypt="SSHA"

# if hash_encrypt is set to CRYPT, you may set a salt format.
# default is "%s", but many systems will generate MD5 hashed
# passwords if you use "$1$%.8s". This parameter is optional!
crypt_salt_format="%s"

##############################################################################
# 
# Unix Accounts Configuration
# 
##############################################################################

# Login defs
# Default Login Shell
# Ex: userLoginShell="/bin/bash"
userLoginShell="/bin/bash"

# Home directory
# Ex: userHome="/home/%U"
userHome="/home/%U"

# Default mode used for user homeDirectory
userHomeDirectoryMode="700"

# Gecos
userGecos="System User"

# Default User (POSIX and Samba) GID
defaultUserGid="513"

# Default Computer (Samba) GID
defaultComputerGid="515"

# Skel dir
skeletonDir="/etc/skel"

# Default password validation time (time in days) Comment the next line if
# you don't want password to be enable for defaultMaxPasswordAge days (be
# careful to the sambaPwdMustChange attribute's value)
defaultMaxPasswordAge="45"

##############################################################################
#
# SAMBA Configuration
#
##############################################################################

# The UNC path to home drives location (%U username substitution)
# Just set it to a null string if you want to use the smb.conf 'logon home'
# directive and/or disable roaming profiles
# Ex: userSmbHome="\\PDC-SMB3\%U"
userSmbHome="\\PDC\%U"

# The UNC path to profiles locations (%U username substitution)
# Just set it to a null string if you want to use the smb.conf 'logon path'
# directive and/or disable roaming profiles
# Ex: userProfile="\\PDC-SMB3\profiles\%U"
userProfile="\\PDC\profiles\%U"

# The default Home Drive Letter mapping
# (will be automatically mapped at logon time if home directory exist)
# Ex: userHomeDrive="H:"
userHomeDrive="H:"

# The default user netlogon script name (%U username substitution)
# if not used, will be automatically username.cmd
# make sure script file is edited under dos
# Ex: userScript="startup.cmd" # make sure script file is edited under dos
userScript="logon.bat"

# Domain appended to the users "mail"-attribute
# when smbldap-useradd -M is used
# Ex: mailDomain="idealx.com"
mailDomain="one2play.hr"

##############################################################################
#
# SMBLDAP-TOOLS Configuration (default are ok for a RedHat)
#
##############################################################################

# Allows not to use smbpasswd (if with_smbpasswd == 0 in smbldap_conf.pm) but
# prefer Crypt::SmbHash library
with_smbpasswd="0"
smbpasswd="/usr/bin/smbpasswd"

# Allows not to use slappasswd (if with_slappasswd == 0 in smbldap_conf.pm)
# but prefer Crypt:: libraries
with_slappasswd="0"
slappasswd="/usr/sbin/slappasswd"

# comment out the following line to get rid of the default banner
# no_banner="1"

So I guess either smbldap-tools have a bug or I failed in configuring it, although in that respect I can't see how...