Differences between revisions 36 and 37
Revision 36 as of 2021-01-17 16:36:39
Size: 6249
Editor: nodiscc
Comment: formatting
Revision 37 as of 2021-01-17 16:37:15
Size: 6250
Editor: nodiscc
Comment: formatting
Deletions are marked like this. Additions are marked like this.
Line 110: Line 110:
* Setup LDAP-backed authentication for Linux accounts ([[NSS#NSS_Setup_with_libnss-ldapd|NSS with libnss-ldapd]], [[PAM#PAM_Setup_with_libpam-ldapd|PAM with libpam-ldapd]], using:  * Setup LDAP-backed authentication for Linux accounts ([[NSS#NSS_Setup_with_libnss-ldapd|NSS with libnss-ldapd]], [[PAM#PAM_Setup_with_libpam-ldapd|PAM with libpam-ldapd]], using:

Translation(s): English - ?Português Brasileiro

This page is a walkthrough of how to set up a Samba Windows NT-style Domain Controller with LDAP as an authentication mechanism.

Windows computers will be able to join the domain as they would a regular Windows NT domain. Users will be able to log on to the domain from Windows machines using the pGina client.

Note: the old, NT-style Domain Controller setup is not to be confused with the newer Samba/ActiveDirectoryDomainController setup available in Samba 4.


Install Samba

We will now install Samba that will be used to emulate a Windows NT server

  • Install the samba package

  • Answer no when asked whether you want to modify smb.conf or not

  • ?Load the samba schema into OpenLDAP

gunzip -c /usr/share/doc/samba/examples/LDAP/samba.ldif.gz > samba.ldif
ldapadd -Q -Y EXTERNAL -H ldapi:/// -f samba.ldif
  • Restart the ldap server: systemctl restart slapd

Create the LDAP directory structure

ToDo: example adding OUs using ldapadd/ldif files

The Samba domain setup requires three OrganizationalUnit objects at the root of your LDAP hierarchy:


Configure Samba to use LDAP

  • Edit the samba server configuration file: nano /etc/samba/smb.conf

  • We will configure Samba to use the ldapsam account database backend. Replace the default passdb backend=tdbsam with

# which backend will be used for storing user/group information
passdb backend = ldapsam:ldap://

# base for all ldap suffixes and for storing the sambaDomain object
ldap suffix = dc=example,dc=org
 where machines should be added to the ldap tree.
ldap machine suffix = ou=machines
# where users should be added to the ldap tree.
ldap user suffix = ou=users
# where groups should be added to the ldap tree.
ldap group suffix = ou=groups

# Distinguished Name (DN) name used by Samba to contact the LDAP server
# when retreiving user account information
ldap admin dn = cn=admin,dc=example,dc=org

# provide the netlogon service for Windows 9X network logons for the
# workgroup it is in.
domain logons = yes

# honor privileges assigned to specific SIDs via net rpc rights
enable privileges = yes
  • Test the configuration, set the samba password and restart the service:

smbpasswd -w password
systemctl restart samba
  • Using slapcat/ldapsearch, verify that a DomainName record was added at the root of the LDAP tree. (ToDo: add example commands)

  • create the following Samba3 Mappings under ou=groups:

Unix/Windows Name: admins
GID: 20000
SID ending number: 512

Unix/Windows Name: users
GID: 20001
SID ending number: 513

Unix/Windows Name: guests
GID: 20002
SID ending number: 514
  • Setup LDAP-backed authentication for Linux accounts (?NSS with libnss-ldapd, ?PAM with libpam-ldapd, using:

    • ldap:// as LDAP server URI

    • dc=example,dc=org as search base,

    • 3 as Samba version

    • cn=admin,dc=example,dc=org as the LDAP admin account (replace with your own value if different)

  • Verify that users, guests, and admins are retrieved by executing: getent group

Page refactoring in progress below this point

Configure Server to authenticate locally using LDAP

aptitude install libpam-ldap

Answer yes
Answer no
Enter the admin profile - cn=admin,dc=buster,dc=lan (replace with your domain structure)
Enter your admin password

vim /etc/pam.d/common-account

add the following to the end of the file:

account         sufficient      pam_ldap.so
account         required        pam_unix.so     try_first_pass

vim /etc/pam.d/common-auth

add the following line to the beginning of the file:

password sufficient pam_ldap.so

restart ssh and samba

/etc/init.d/ssh restart (if ssh is installed)
/etc/init.d/samba restart

install nscd

aptitude install nscd
vim /etc/samba/smb.conf

add the following line to the file:

ldap password sync=yes

Setup users in the Domain

log back into phpldapadmin and create the following Samba3 Users under the users OU:

First Name

Last Name



SID ending


Home Directory















verify the new users are in the database:

getent passwd

create home directory

mkdir /home/buster
mkdir /home/buster/(username)
cp /etc/skel/.* /home/buster/(username)
chown -R (username):users /home/buster/(username)

Create Machine accounts for domain members

log back into phpldapadmin and create the a Samba3 machines under the machines OU:

Machine Name




smbpwd -a root

enter your root password

Join a windows client to the domain

go to your windows machine and right-click on mycomputer and select properties
on the name tab select change
select the domain radio button and enter buster.lan and click ok
enter root for the username
enter your root password
you should see a welcome to the buster.lan domain message and then reboot and you can log in using user from your LDAP database.

CategoryNetwork | CategorySoftware | CategorySystemAdministration | CategoryObsolete | ToDo: merge with other Samba pages