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Chapter 19. Lightweight Directory Access Protocol (LDAP) 255

4. Create your LDAP directory. Examples of LDAP entries are provided at the PADL Software

website:

http://www.padl.com/ldap_examples.html

5. Add entries to your LDAP directory with ldapadd.

6. Use ldapsearch to see if slapd is working.

7. At this point, your LDAP directory should exist. You can now conﬁgure your LDAP-enabled

applications to use the LDAP directory.

19.10. Conﬁguring Your System to Authenticate Using OpenLDAP

This section provides a brief overview of how to conﬁgure your Red Hat Linux system to authenticate

using OpenLDAP. Unless you are an OpenLDAP expert, you will probably need more documentation

than is provided here. Please refer to the references provided in Section 19.11 for more information.

19.10.1. Install the Necessary LDAP Packages

First, you should make sure that the appropriate packages are installed on both the LDAP server and

the LDAP client machines. The LDAP server needs the openldap-server package.

The LDAP client machines need the following packages installed: openldap, openldap-clients,

auth_ldap, and nss_ldap.

19.10.2. Edit the Conﬁguration Files

19.10.2.1. Edit slapd.conf

Next, edit the /etc/openldap/slapd.conf ﬁle to make sure it matches the speciﬁcs of your orga-

nization.

Please refer to Section 19.6.1 for instructions on editing slapd.conf.

19.10.2.2. Edit ldap.conf

Edit the ldap.conf ﬁle on the LDAP server and clients.

Edit /etc/ldap.conf, the conﬁguration ﬁle for nss_ldap and pam_ldap, to reﬂect your organiza-

tion and search base. The ﬁle /etc/openldap/ldap.conf is the conﬁguration ﬁle for the command

line tools such as ldapsearch and ldapadd, and it will also need to be edited for your LDAP setup.

Client machines will need to have both of these ﬁles modiﬁed.

19.10.2.3. Edit /etc/nsswitch.conf

To use nss_ldap, you will need to add ldap to the appropriate ﬁelds in /etc/nsswitch.conf. (Be

very careful when editing this ﬁle; be sure that you know what you are doing.) For example:

passwd: files ldap

shadow: files ldap

group: files ldap

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Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Pagina 255