How to Install and Configure OpenLDAP Server on Rocky Linux 8 / AlmaLinux 8. OpenLDAP is a robust software directory server that provides a secure authentication and authorization infrastructure for numerous applications. In this tutorial, we will learn how to install and configure OpenLDAP Server on Rocky Linux 8 / AlmaLinux 8.
Before proceeding, it is a good practice to take a snapshot of your system as a safeguard against any unexpected issues that may arise during the installation process.
Directory services also known as name services, function as the authoritative identity provider (IdP) for several companies worldwide. They map the names of network resources to the respective network addresses.
It acts as a shared information infra for locating, managing, administering, and organizing everyday resources such as volumes, folders, files, printers, users, groups, devices, telephone numbers e.t.c. It is so essential to choose the correct directory server for your organization as it becomes the source of truth for authentication and authorization on your digital workspace.
LDAP is an acronym for Lightweight directory access protocol. This is a protocol used to access and modify X.500-based directory service running over TCP/IP. It is used to tackle authentication and share information about users, systems, services, networks, and applications from a directory service to other services/applications. It can not only read Active Directory but also be integrated with other Linux programs.
OpenLDAP is the free and open-source implementation of LDAP developed by the OpenLDAP Project and released under the unique BSD-style license called the OpenLDAP Public License. It provides a command-line utility that can be used to build and manage the LDAP directory. To use this tool, you need to have some deep knowledge of the LDAP protocol and structure. To eliminate the tussle, you can use third-party tools like phpLDAPadmin to manage the service.
OpenLDAP offers the below cool features:
Low Costs: it is free, making it a common choice for startups.
Flexibility: This gives it broad applicability.
LDAPv3 Support: It offers support for Simple Authentication and Security Layer and Transport Layer Security.
IPv6 support: OpenLDAP supports the next generation Internet Protocol version 6.
OS-Agnosticism: It is fully supported on Mac, Windows, and Linux systems.
Updated C API: This improves the way programmers can connect to and use LDAP directory servers.
Enhanced Stand-Alone LDAP Server
DIFv1 Support: It provides full compliance with the LDAP Data Interchange Format (LDIF) version 1.
In this guide, we will learn how to install and configure the OpenLDAP Server on Rocky Linux 8 / AlmaLinux 8.
Prepare Your Server
Before we begin the installation, you need to ensure the server is updated:
sudo dnf update -y
Once complete, check if a reboot is required and perform it:
Package Architecture Version Repository Size
symas-openldap-clients x86_64 2.4.59-1.el8 sofl 203 k
symas-openldap-servers x86_64 2.4.59-1.el8 sofl 2.2 M
symas-openldap x86_64 2.4.59-1.el8 sofl 345 k
Install 3 Packages
Total download size: 2.8 M
Installed size: 6.8 M
Is this ok [y/N]: y
Once the installation is complete, verify as shown:
There are several schemas required by OpenLDAP. These include Attribute Types, Attribute Syntaxes, Matching Rules, and types of objects that a directory may have. By default, the schemas are stored under /etc/openldap/schema/. For now, we need the cosine, nis & inetorgperson LDAP schemas.
$ sudo vim /etc/openldap/ldap.conf
For the changes to apply, restart the service:
sudo systemctl restart slapd
That marks the end of this guide on how to install and configure OpenLDAP Server on Rocky Linux 8 / AlmaLinux 8. At this point, you should be able to configure OpenLDAP and create users, and groups and even add TLS certificates.
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