Install OpenLDAP In Ubuntu 15.10 And Debian 8

About OpenLDAP

OpenLDAP is a free open source Light Weight Directory Access protocol developed by the OpenLDAP project. It is a platform independent protocol, so that it runs on all Linux/Unix like systems, Windows, AIX, Solaris and Android.

OpenLDAP includes:

  • slapd – stand-alone LDAP daemon (server)
  • libraries implementing the LDAP protocol, and utilities, tools, and sample clients.

In this tutorial, let us see how to install OpenLDAP and how to configure it in Ubuntu / Debian server. I tested this tutorial in Ubuntu 15.10, however this steps should work on Debian 7/8 and previous versions of Ubuntu, including Ubuntu 15.04/14.10/14.04 etc.

Here is my testing system’s details:

  • Operating System : Ubuntu 15.10 64 bit server
  • Hostname : server.unixmen.local
  • IP Address : 192.168.1.103/24

First let us see how to install openLDAP.

1. Install OpenLDAP in Ubuntu 15.10 / Debian 8

Enter the following command in Terminal to install openldap.

Switch to root user:

sudo su

Or

su

Run the following command to install OpenLDAP.

apt-get install slapd ldap-utils

During the installation, you’ll be asked to set password for the LDAP admin account. Enter your admin password here.

root@server: -home-sk_001

Re-enter the password.

root@server: -home-sk_002

OpenLDAP is installed now. Let’s go to the configuration task.

2. Configure OpenLDAP

Edit “/etc/ldap/ldap.conf” file,

vi /etc/ldap/ldap.conf

Find, uncomment and replace ‘BASE’ and ‘ URI’ values with your domain name and IP Address as shown below.

#
# LDAP Defaults
#
# See ldap.conf(5) for details
# This file should be world readable but not world writable.
BASE    dc=unixmen,dc=local
URI     ldap://server.unixmen.local ldap://server.unixmen.local:666
#SIZELIMIT      12
#TIMELIMIT      15
#DEREF          never
# TLS certificates (needed for GnuTLS)
TLS_CACERT      /etc/ssl/certs/ca-certificates.crt

Save and close the file.

Next, we should reconfigure the slapd with the updated values.

dpkg-reconfigure slapd

The following screen should appear. Select “No” and press Enter.

root@server: -home-sk_003

Enter the DNS domain name.

root@server: -home-sk_004

Enter the Organization name (i.e your company name).

root@server: -home-sk_005

Enter the LDAP admin password which you created in the earlier step.

root@server: -home-sk_006

Re-enter the password.

root@server: -home-sk_007

Select the backend database. I go with defaults.

root@server: -home-sk_003

Select whether you want to delete the database automatically or keep it when slapd is removed. Here I want to keep my old database, so I clicked No.

root@server: -home-sk_009

Select Yes to move old database.

root@server: -home-sk_010

Select No and Press Enter.

root@server: -home-sk_011

That’s it. We have successfully configured OpenLDAP. Let us go ahead and check whether it’s working or not.

Test LDAP Server

Run the following command to test OpenLDAP:

ldapsearch -x

Sample output:

# extended LDIF
#
# LDAPv3
# base <dc=unixmen,dc=local> (default) with scope subtree
# filter: (objectclass=*)
# requesting: ALL
#

# unixmen.local
dn: dc=unixmen,dc=local
objectClass: top
objectClass: dcObject
objectClass: organization
o: unixmen
dc: unixmen

# admin, unixmen.local
dn: cn=admin,dc=unixmen,dc=local
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
description: LDAP administrator

# search result
search: 2
result: 0 Success

# numResponses: 3
# numEntries: 2

If you see the ‘Success’ message in your output, then Congratulations! LDAP Server is working!!

LDAP Server Administration

Administration of LDAP server from command line mode is bit difficult. We can’t memorize all LDAP commands. So, we will use an easier GUI administration tool called “phpldapadmin” to manage, configure, and administer LDAP server.

Install phpLDAPadmin

phpLDAPadmin is a web-based LDAP administration tool for managing your LDAP server. Using phpLDAPadmin, you can browse your LDAP tree, view LDAP schema, perform searches, create, delete, copy and edit LDAP entries. You can even copy entries between servers.

Enter the following command to install phpLDAPAdmin:

apt-get install phpldapadmin

Create a symbolic link for phpldapadmin directory.

ln -s /usr/share/phpldapadmin/ /var/www/html/phpldapadmin

On Ubuntu 14.10 and lower versions, run:

ln -s /usr/share/phpldapadmin/ /var/www/phpldapadmin

Edit “/etc/phpldapadmin/config.php” file,

vi /etc/phpldapadmin/config.php

Set the correct timezone. To do that, find and uncomment the following line and set your Timezone.

[...]
$config->custom->appearance['timezone'] = 'Asia/Kolkata';
[....]

Scroll down further and Replace the domain names with your own values.

To do that, Find “Define LDAP Servers” section in the config file and edit the following lines as shown below.

[...]
// Set your LDAP server name //
$servers->setValue('server','name','Unixmen LDAP Server');
[...]
// Set your LDAP server IP address // 
$servers->setValue('server','host','192.168.1.103');
[...]
// Set Server domain name //
$servers->setValue('server','base',array('dc=unixmen,dc=local'));
[...]
// Set Server domain name again//
$servers->setValue('login','bind_id','cn=admin,dc=unixmen,dc=local');
[...]

Restart the apache service.

systemctl restart apache2

On Ubuntu 14.10 and older versions, run:

service apache2 restart

Make sure that you have opened apache server port “80” and LDAP default port “389” in your firewall/router configuration.

ufw allow 80

Sample output:

Rules updated
Rules updated (v6)
ufw allow 389

Sample output:

Rules updated
Rules updated (v6)

The above steps are not necessary for Debian systems.

Test phpLDAPadmin

Open your web browser and navigate to: “http://IP-Address/phpldapadmin”.

The following screen should appear.

phpLDAPadmin (1.2.2) – – Google Chrome_004

Click “login” on the left pane. Enter the LDAP admin password that you have created during OpenLDAP installation, and click “Authenticate”.

phpLDAPadmin (1.2.2) – – Google Chrome_005

Now the main console screen of phpldapadmin will open.

You can see the LDAP domain “unixmen.local” and other details on the left.

phpLDAPadmin (1.2.2) – – Google Chrome_006

From here, you can add additional objects, such as Organizational Unit, Users and groups etc.

Creating Objects

1. Create Organizational Unit(OU):

Lets create some sample objects from the phpldapadmin console. First, we will create an OU.

Click on the “+” sign near the line “dc=unixmen” and click “Create new entry here” link.

Selection_007

Scroll down and Select “Generic-Organizational Unit”.

Selection_008

Enter the name of the Organizational unit (Ex.sales) and Click “Create Object”.

Selection_009

Finally, click “Commit”.

Selection_010

Now, you will see the newly created OU in main LDAP section on the left pane.

Selection_011

2. Create Group:

Click on the sales OU on the left pane and click on “Create a child entry” link.

phpLDAPadmin (1.2.2) – – Google Chrome_012

In the next window, Select “Generic: Posix Group”.

Selection_013

Enter the name of the group and click Create Object button. For example, here i enter the group name as “sales-group”.

Selection_014

Click Commit to save changes.

Selection_015

Now you can see that the newly created group called “sales-group” under the sales OU.

Selection_016

3. Create User:

Now, let us create a new user under sales-group.

Click on the sales-group on the left. Select Create a child entry link button.

phpLDAPadmin (1.2.2) – – Google Chrome_017

In the next window, Select “Generic: User Account”.

Selection_018

Enter the user details such as common name, GID number, last name, Login shell, user password and user id etc., as shown in the below screen shot and click Create object. For example. here I am going to create a user called “kumar”.

phpldapadmin_cmd

And then Click “Commit” to save the changes.

Selection_019

Now the newly created user “kumar” will be found under “sales-group” object.

Selection_020

Also, you can verify the newly created objects are really existing with command:

ldapsearch -x

Sample output:

# extended LDIF
#
# LDAPv3
# base <dc=unixmen,dc=local> (default) with scope subtree
# filter: (objectclass=*)
# requesting: ALL
#

# unixmen.local
dn: dc=unixmen,dc=local
objectClass: top
objectClass: dcObject
objectClass: organization
o: unixmen
dc: unixmen

# admin, unixmen.local
dn: cn=admin,dc=unixmen,dc=local
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
description: LDAP administrator

# sales, unixmen.local
dn: ou=sales,dc=unixmen,dc=local
objectClass: organizationalUnit
objectClass: top
ou: sales

# sales-group, sales, unixmen.local
dn: cn=sales-group,ou=sales,dc=unixmen,dc=local
gidNumber: 500
cn: sales-group
objectClass: posixGroup
objectClass: top

# kumar, sales-group, sales, unixmen.local
dn: cn=kumar,cn=sales-group,ou=sales,dc=unixmen,dc=local
cn:: IGt1bWFy
gidNumber: 500
homeDirectory: /home/users/kumar
sn: kumar
loginShell: /bin/sh
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: top
uidNumber: 1000
uid: kumar

# search result
search: 2
result: 0 Success

# numResponses: 6
# numEntries: 5

As you see in the above output, the new objects, namely ‘sales’, ‘sales-group’, and ‘kumar’ have been successfully created under the main LDAP domain. Similarly, you can create as many as objects you wanted.

Installing and configuring OpenLDAP in Debian and Ubuntu and derivatives is really easy and straight forward. Even a novice users can easily setup a working LDAP server within an hour.

Now OpenLDAP Server is ready to use.

I have successfully installed and configured LDAP server, what now? Please refer our next article How To Configure Linux Clients To Authenticate Using OpenLDAP.

Good luck! Happy Week end!!

  • Himanshu Chauhan

    Hope this works:

    # ldapsearch -x -b “dc=example,dc=com” -H ldap://192.168.1.178

  • DoctorLinux Jakoubi

    Hello Unixmen team,
    I have installed ldap with your tuto but i have this probleme when i connect to phpldapadmin:

    Automatically removed objectClass from templateSamba: Account: sambaSAMAccount removed from template as it is not defined in the schemaAutomatically removed objectClass from templateSamba: Machine: sambaSAMAccount removed from template as it is not defined in the schemaAutomatically removed objectClass from templateSamba: Group Mapping: sambaGroupMapping removed from template as it is not defined in the schemaAutomatically removed attribute from templateSamba: Group Mapping: displayName removed from template as it is not defined by an ObjectClassAutomatically removed objectClass from templateCourier Mail: Alias: courierMailAlias removed from template as it is not defined in the schemaAutomatically removed objectClass from templateCourier Mail: Account: courierMailAccount removed from template as it is not defined in the schemaAutomatically removed attribute from templateCourier Mail: Account: uidNumber removed from template as it is not defined by an ObjectClassAutomatically removed attribute from templateCourier Mail: Account: gidNumber removed from template as it is not defined by an ObjectClassAutomatically removed attribute from templateCourier Mail: Account: homeDirectory removed from template as it is not defined by an ObjectClassAutomatically removed objectClass from templateThunderbird: Address Book Entry: mozillaOrgPerson removed from template as it is not defined in the schemaAutomatically removed attribute from templateThunderbird: Address Book Entry: c removed from template as it is not defined by an ObjectClassUnknown XML setting [array]Unknown attribute setting will be ignored. [s:2:”10″;]Missing [post] setting in XML file [helper][helper] needs an accompanying [post] action.Unknown XML setting [location]Unknown XML type setting for helper will be ignored. [side]Automatically removed attribute from templateUser Group: memberUid removed from template as it is not defined by an ObjectClass

  • Sandeep PT Rajpurohit

    Could you please help me on master slave configuration through Ldap.

  • Sandeep PT Rajpurohit

    Hi, Could you please help me with installation openldap master and slave configuration.

  • kllew

    How to add network folders for each user you add?