LDAP IN RHEL-5


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
ou 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

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=*)'
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Step-by-step OpenLDAP Installation and Configuration - Page 2

Step-by-step OpenLDAP Installation and Configuration of Client System

LDAP Client Configuration

Step #1. Installation

[root@ldapclient ~]# yum install authconfig

Step #2. Run the command

[root@ldapclient ~]# authconfig

Step #3. Settings

[*] Use LDAP [*] Use LDAP Authentication
[Both should be checked]
Click "Next".
[ ] Use TLS
Server: ldap.adminmart.com
Base DN: dc=adminmart,dc=com
Click "Ok" to confirm.
Note: Use your domain name instead of adminmart.
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