How to Setup LDAP

Step-by-step OpenLDAP Installation and Configuration

This tutorial describes how to install and configure an OpenLDAP
server and also an OpenLDAP client.
Step by Step Installation and Configuration OpenLDAP Server

Software:  OS-Cent OS 4.4, openldap 2.2.13-6.4E
System name:   ldap.adminmart.com
Domain name:   adminmart.com
System IP:     192.168.1.212

Note: Use your domain name and IP instead of adminmart.

Easy steps for adding users:
   1. Create unix user
   2. Create unix user's ldap passwd file
   3. Convert passwd.file to ldif file
   4. Add ldap file to LDAP Directory using ldapadd
Step #1. Requirements

   compat-openldap.i386 0:2.1.30-6.4E
   openldap-clients.i386 0:2.2.13-6.4E
   openldap-devel.i386 0:2.2.13-6.4E
   openldap-servers.i386 0:2.2.13-6.4E
   openldap-servers-sql.i386 0:2.2.13-6.4E

You can install them using the command:

yum install *openldap* -y


Step #2. Start the service

[root@ldap ~]# chkconfig --levels 235 ldap on
[root@ldap ~]# service ldap start
Remove ads

Step #3. Create LDAP root user password

[root@ldap ~]# slappasswd
   New password:
   Re-enter new password:
   {SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW
[root@ldap ~]#
Step #4. Update /etc/openldap/slapd.conf for the root password

[root@ldap ~]# vi /etc/openldap/slapd.conf

   #68 database        bdb
   #69 suffix          "dc=adminmart,dc=com"
   #70 rootdn          "cn=Manager,dc=adminmart,dc=com"
   #71 rootpw          {SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW

Step #5. Apply Changes

[root@ldap ~]# service ldap restart
Step #6. Create test users

[root@ldap ~]# useradd test1
[root@ldap ~]# passwd test1
   Changing password for user test1.
   New UNIX password:
   Retype new UNIX password:
   passwd: all authentication tokens updated successfully.
[root@ldap ~]# useradd test2
[root@ldap ~]# passwd test2
   Changing password for user test2.
   New UNIX password:
   Retype new UNIX password:
   passwd: all authentication tokens updated successfully.
[root@ldap ~]#

Note: Repeat the same for the rest of users
Step #7. Migrate local users to LDAP

[root@ldap ~]# grep root /etc/passwd > /etc/openldap/passwd.root
[root@ldap ~]# grep test1 /etc/passwd > /etc/openldap/passwd.test1
[root@ldap ~]# grep test2 /etc/passwd > /etc/openldap/passwd.test2

 Note: Repeat the same for the rest of users
Step #8. Update default settings on file
/usr/share/openldap/migration/migrate_common.ph

   #71 $DEFAULT_MAIL_DOMAIN = "adminmart.com";
   #74 $DEFAULT_BASE = "dc=adminmart,dc=com";

Step #9. Convert passwd.file to ldif (LDAP Data Interchange Format) file

[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl
/etc/openldap/passwd.root /etc/openldap/root.ldif
[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl
/etc/openldap/passwd.test1 /etc/openldap/test1.ldif
[root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl
/etc/openldap/passwd.test2 /etc/openldap/test2.ldif

Note: Repeat the same for the rest of users
Step #10. Update root.ldif file for the "Manager" of LDAP Server

[root@ldap ~]# vi /etc/openldap/root.ldif

   #1 dn: uid=root,ou=People,dc=adminmart,dc=com
   #2 uid: root
   #3 cn: Manager
   #4 objectClass: account

Step #11. Create a domain ldif file (/etc/openldap/adminmart.com.ldif)

[root@ldap ~]# cat /etc/openldap/adminmart.com.ldif

   dn: dc=adminmart,dc=com
   dc: adminmart
   description: LDAP Admin
   objectClass: dcObject
   objectClass: organizationalUnit
   ou: rootobject
   dn: ou=People, dc=adminmart,dc=com
   ou: People
   description: Users of adminmart
   objectClass: organizationalUnit

Step #12. Import all users in to the LDAP

Add the Domain ldif file

[root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f
/etc/openldap/adminmart.com.ldif
   Enter LDAP Password:
   adding new entry "dc=adminmart,dc=com"
   adding new entry "ou=People, dc=adminmart,dc=com"
[root@ldap ~]#

Add the users:

[root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f
/etc/openldap/root.ldif
   Enter LDAP Password:
   adding new entry "uid=root,ou=People,dc=adminmart,dc=com"
   adding new entry "uid=operator,ou=People,dc=adminmart,dc=com"
[root@ldap ~]#

[root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f
/etc/openldap/test1.ldif
   Enter LDAP Password:
   adding new entry "uid=test1,ou=People,dc=adminmart,dc=com"
[root@ldap ~]#

[root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f
/etc/openldap/test2.ldif
   Enter LDAP Password:
   adding new entry "uid=test2,ou=People,dc=adminmart,dc=com"
 [root@ldap ~]#

 Note: Repeat the same for the rest of users
Step #13. Apply Changes

[root@ldap ~]# service ldap restart
Step #14. Test LDAP Server

It prints all the user information:

[root@ldap ~]# ldapsearch -x -b 'dc=adminmart,dc=com' '(objectclass=*)'






Client Configuration
#authconfig-tui
#enable ldap


Thanks
Bilal.M.K