--- title: "How to Install and Configure an OpenLDAP Ubuntu Server" description: "Unlock the power of OpenLDAP on Ubuntu for centralized user authentication, seamless access control management, and enhanced directory services!" canonical: "https://adamtheautomator.com/openldap/" --- # How to Install and Configure an OpenLDAP Ubuntu Server > Unlock the power of OpenLDAP on Ubuntu for centralized user authentication, seamless access control management, and enhanced directory services! Source: https://adamtheautomator.com/openldap/ --- ATA Learning Tap to hide [ ATA Learning ](/) * [Home](/) * [Tutorials](/tutorials/) * [Instructors](/author/) * [Advertising](/advertising/) * [Recommended Resources](/resources/) * [About Adam](/about-adam/) Search for: * [](https://twitter.com/adbertram) * [](https://github.com/Adam-the-Automator) * [](https://www.linkedin.com/company/adam-the-automator-llc) * [](/feed/) ![How to Install and Configure an OpenLDAP Ubuntu Server](https://adamtheautomator.com/wp-content/uploads/2024/03/openldap-4.jpg) # How to Install and Configure an OpenLDAP Ubuntu Server [![](https://secure.gravatar.com/avatar/1bc5e1d52466fc3739f550c8d78be310684747bf1466a98d698320627ea243e2?s=192&d=mm&r=g)Michael Nguyen Tu](https://adamtheautomator.com/author/michael-nguyen-tu/)25 March 202411 min. read Categories: [IT Ops](/category/it-ops/) Tags:[Linux](/tag/linux/)[OpenLDAP](/tag/openldap/)[Ubuntu Linux](/tag/ubuntu-linux/) Table of Contents * [Prerequisites](#prerequisites) * [Installing the OpenLDAP Server on Ubuntu](#installing-the-openldap-server-on-ubuntu) * [Keeping the OpenLDAP Server Safe with UFW Firewall](#keeping-the-openldap-server-safe-with-ufw-firewall) * [Enabling PHP Support in Apache for LAM](#enabling-php-support-in-apache-for-lam) * [Setting Up the LAM Web Interface](#setting-up-the-lam-web-interface) * [Creating Groups and Users in LAM](#creating-groups-and-users-in-lam) * [Installing and Configuring the OpenLDAP Client](#installing-and-configuring-the-openldap-client) * [Checking Your OpenLDAP Setup](#checking-your-openldap-setup) * [Conclusion](#conclusion) In today’s fast-paced digital world, keeping tabs on user accounts and access control is no easy feat. But fear not! OpenLDAP is a solution to your woes, a widespread open-source implementation of the [Lightweight Directory Access Protocol (LDAP)](https://ldap.com/). This tutorial will walk you through the ins and outs of setting up an OpenLDAP server on your Ubuntu machine. Say goodbye to scattered user data and hello to centralized management, authentication, and authorization. Read on to streamline your user management and simplify your IT workflows! ## Prerequisites This tutorial houses hands-on demonstrations in setting up an OpenLDAP server. If you wish to follow along, be sure you have the following: * Two machines (one for the server and one for the client) running Ubuntu 20.04 or later. Related:[Install Ubuntu Server 20.04: A Step-by-Step Walkthrough](https://adamtheautomator.com/install-ubuntu/) * A non-root user with `sudo` privileges on both machines. Related:[How to Create Users on Ubuntu Linux in Multiple Ways](https://adamtheautomator.com/create-user-on-ubuntu/) ## Installing the OpenLDAP Server on Ubuntu From ensuring your system’s readiness, you now delve into the heart of your setup, installing the OpenLDAP server. LDAP holds significant weight in server administration, especially when managing user accounts and access control within an organization’s network. To install OpenLDAP server on your system, proceed with the following: > 💡 _Throughout this guide, you must use your domain name to replace ata.com._ 1\. Open your terminal and execute the following command to set your machine’s hostname (i.e., `ldap.ata.com`). This command has no output to the terminal but allows other devices on the network to recognize your machine. ```bash sudo hostnamectl set-hostname ldap.ata.com ``` 2\. Next, run the [`apt update`](https://linuxize.com/post/how-to-use-apt-command/#updating-package-index-apt-update) command below to update your system’s package index. ```bash sudo apt update -y ``` ![openldap1-Updating the system’s package list ](https://adamtheautomator.com/wp-content/uploads/2024/03/image-164.png) Updating the system’s package list Related:[Ubuntu Apt Get Mastery: A Guide with Practical Examples](https://adamtheautomator.com/ubuntu-apt-get/) 3\. Once updated, run the below `apt install` command to install the Apache web server and essential components (PHP modules). These components are necessary for the proper functioning of OpenLDAP. ```bash sudo apt install apache2 php php-cgi libapache2-mod-php php-mbstring php-common php-pear -y ``` ![Installing Apache web server and essential PHP modules ](https://adamtheautomator.com/wp-content/uploads/2024/03/image-163.png) Installing Apache web server and essential PHP modules Related:[Install Apache on Ubuntu and Master Website Traffic](https://adamtheautomator.com/install-apache-on-ubuntu/) 4\. Now, invoke this command to install the OpenLDAP server and [LDAP Account Manager (LAM)](https://www.ldap-account-manager.org/lamcms/), a convenient web-based management tool. ```bash sudo apt install slapd ldap-utils -y && sudo apt install ldap-account-manager -y ``` ![Installing the OpenLDAP server and LAM](https://adamtheautomator.com/wp-content/uploads/2024/03/image-162.png) Installing the OpenLDAP server and LAM 5\. Provide an admin password for your LDAP server when prompted during the installation. ![Providing an admin password for the LDAP server](https://adamtheautomator.com/wp-content/uploads/2024/03/image-161.png) Providing an admin password for the LDAP server 6\. Once installed, execute the following `systemctl` command to confirm the OpenLDAP server’s (`slapd`) `status`. ```bash sudo systemctl status slapd ``` Related:[Correct Way of Using Ubuntu systemctl to Control Systemd](https://adamtheautomator.com/ubuntu-systemctl/) ![Confirming the OpenLDAP server is active and running](https://adamtheautomator.com/wp-content/uploads/2024/03/image-160.png) Confirming the OpenLDAP server is active and running 7\. Lastly, run the `slapcat` command below to check the LDAP database contents. ```bash sudo slapcat ``` A list of default schemas and configurations below indicates that OpenLDAP has been installed correctly. ![Checking the LDAP database contents](https://adamtheautomator.com/wp-content/uploads/2024/03/image-159.png) Checking the LDAP database contents ## Keeping the OpenLDAP Server Safe with UFW Firewall You have successfully installed your OpenLDAP server, but you must fortify its defenses before it can guard your network. How? By enlisting the help of [UFW](https://adamtheautomator.com/ufw-firewall/), Ubuntu’s trusty default firewall. Configuring the UFW Firewall is like setting up a digital moat around your castle. You will tailor the firewall to shield your server, allowing only essential traffic to pass through and keeping digital marauders at bay. To ensure secure connections on your OpenLDAP server, you must open certain ports for the OpenLDAP server as follows: Execute the following `ufw` commands to `allow` incoming traffic on ports for HTTP (`80`), HTTPS (`443`), and LDAP (`389`). ```bash # Allow HTTP Traffic sudo ufw allow 80 # Allow HTTPS Traffic sudo ufw allow 443 # Allow LDAP Traffic sudo ufw allow 389 ``` ![Configuring the UFW Firewall for OpenLDAP Server](https://adamtheautomator.com/wp-content/uploads/2024/03/image-166.png) Configuring the UFW Firewall for OpenLDAP Server Now, run the command below to check a detailed overview of the current status and configuration of UFW on your system. ```bash sudo ufw status verbose ``` The output below confirms that the firewall rules you added were applied successfully. ![Checking the UFW status](https://adamtheautomator.com/wp-content/uploads/2024/03/image-165.png) Checking the UFW status ## **Enabling PHP Support in Apache for LAM** After fortifying the security of your LDAP server with the UFW Firewall, you must ensure Apache recognizes and processes PHP files effectively. This critical step paves the way for seamless integration between Apache and LAM, enabling efficient management of your LDAP directory. To enable PHP support in Apache, carry out the following: 1\. Run the following [`a2enconf`](https://manpages.ubuntu.com/manpages/xenial/man8/a2enconf.8.html) command to enable a configuration file for Apache’s [PHP Common Gateway Interface (CGI)](https://www.php.net/manual/en/install.unix.commandline.php). These configuration files typically contain directives related to configuring PHP for Apache, such as setting up handlers or defining options for PHP execution. By enabling these configuration files, you ensure that Apache is properly configured to handle PHP scripts using the CGI interface. ```bash sudo a2enconf php*-cgi ``` ![Enabling the PHP module](https://adamtheautomator.com/wp-content/uploads/2024/03/image-168.png) Enabling the PHP module 2\. Once enabled, execute the command below to `reload` the Apache service (`apache2`) to apply the changes. This command outputs nothing but ensures that any modifications made to the Apache configuration take effect. This process includes enabling the PHP CGI module without restarting the entire Apache service. ```bash sudo systemctl reload apache2 ``` 3\. Now, invoke this command to check the `status` of the `apache2` service to ensure everything’s running smoothly. ```bash sudo systemctl status apache2 ``` The output will show the current status of the Apache web server as **active (running)** without any errors, as below. ![Checking the status of the Apache service](https://adamtheautomator.com/wp-content/uploads/2024/03/image-167.png) Checking the status of the Apache service ## Setting Up the LAM Web Interface Moving on from enabling PHP support in Apache for LAM, you now focus on a centralized hub where you can control your OpenLDAP server—the LAM web interface. This web interface offers an intuitive platform for administrators like yourself to oversee directory services. To set up the LAM web interface, proceed with these steps: 1\. Run the `ifconfig` command below to display your network information. ```bash ifconfig ``` Look for and note down your server’s IP address (i.e., _**192.168.1.7**_), typically denoted by **inet.** ![Noting down the server’s IP address](https://adamtheautomator.com/wp-content/uploads/2024/03/image-175.png) Noting down the server’s IP address 2\. Open your favorite web browser, and navigate to your server’s IP address followed by _/lam_ into the address bar (e.g., http://192.168.1.7/lam). Doing so redirects your browser to LAM’s web interface, as shown below. ![Accessing the LAM web interface](https://adamtheautomator.com/wp-content/uploads/2024/03/image-174.png) Accessing the LAM web interface 3\. Click **LAM configuration** (top-right) on the login page to access the LDAP Account Manager page (step four). ![Accessing the LAM Account Manager](https://adamtheautomator.com/wp-content/uploads/2024/03/image-173.png) Accessing the LAM Account Manager 4\. Now, click **Edit server profiles** to modify your LAM settings. ![Editing server profiles to modify the LAM settings](https://adamtheautomator.com/wp-content/uploads/2024/03/image-172.png) Editing server profiles to modify the LAM settings 5\. Input the default **lam** password on the second login page, and click **OK** to authenticate. ![Authenticating access to the LAM web interface](https://adamtheautomator.com/wp-content/uploads/2024/03/image-171.png) Authenticating access to the LAM web interface 6\. Once logged in, configure the following server and language settings under the **General settings**: * **Tree suffix** – Type in your directory’s base distinguished name (DN), such as **dc=ata,dc=com**, replacing them with your actual domain components. * **Default language** – Select your language preference for the LAM web interface. * **Time zone** – Choose the time zone that aligns with your server’s location, which is crucial for precise management of account expirations. ![Configuring the server and language settings](https://adamtheautomator.com/wp-content/uploads/2024/03/image-170.png) Configuring the server and language settings 7\. Scroll down and set the options for security and profile password with the following: * **List of valid users** – Insert the DN of your LDAP admin user, for example, **cn=admin,dc=ata,dc=com**. * **New password** and **Reenter password** – Create and confirm a strong password for the LAM admin account to replace the initial default password. Related:[Keep End Users Secure with Strong Passwords](https://adamtheautomator.com/strong-passwords/) * Keep other settings as default, and click **Save** to apply your configurations. Once saved, your browser will be redirected back to the login page. ![Configuring security settings and profile password](https://adamtheautomator.com/wp-content/uploads/2024/03/image-169.png) Configuring security settings and profile password ## Creating Groups and Users in LAM With your LAM dashboard ready, you focus on laying the foundation for an organized and secure directory structure—groups and users. Creating groups and users is like organizing your team into departments and giving everyone their ID badge. To create groups and users in LAM, execute the following: 1\. Navigate to the LDAP Account Manager following steps three to five of the “Setting Up the LAM Web Interface” section. But this time, input your newly configured password for the OpenLDAP server. 2\. In the LAM Account Manager, navigate to the **Account types** tab to view all access type options. ![Accessing the account types](https://adamtheautomator.com/wp-content/uploads/2024/03/image-189.png) Accessing the account types 3\. Next, scroll down and set the **LDAP suffixes** while replacing (i.e., **dc=ata,dc=com**), accordingly as follows: * **Users** – **ou=Departments**, * **Groups** – **ou=Groups,** * Leave other settings as default, and click **Save**. After saving, your browser will be redirected to the admin login page (step four). ![Setting the LDAP suffixes](https://adamtheautomator.com/wp-content/uploads/2024/03/image-188.png) Setting the LDAP suffixes 4\. Now, enter the admin password you set during installation, and click **Login** to access your OpenLDAP server. ![Logging in to the OpenLDAP server](https://adamtheautomator.com/wp-content/uploads/2024/03/image-187.png) Logging in to the OpenLDAP server 5\. When prompted, click **CREATE** to establish the two missing suffixes. ![Creating the two missing suffixes](https://adamtheautomator.com/wp-content/uploads/2024/03/image-186.png) Creating the two missing suffixes 6\. Upon creation, click **Tree view** (upper-right) to see the new LDAP suffixes (**Departments** and **Groups**) displayed in a hierarchical structure, as shown below. ![Viewing the hierarchical structure](https://adamtheautomator.com/wp-content/uploads/2024/03/image-185.png) Viewing the hierarchical structure 7\. Moving on, click **Tools** (upper-right) and choose **OU editor** to configure a new department with the following: * **Parent DN** – Choose **Department > ata > com for the Parent DN**. This option specifies where the new department will be created within your LDAP directory. * **Name** – Input **IT** (arbitrary) as the department (OU) name. Once configured, click **OK** to add a new department named IT. ![Adding a new department within the LDAP directory](https://adamtheautomator.com/wp-content/uploads/2024/03/image-184.png) Adding a new department within the LDAP directory 8\. Now, navigate to the **Groups** tab and click **New group** to create a new group. Creating groups simplifies administration, promotes collaboration, enforces policies, and facilitates organizational scalability. ![Creating a new group](https://adamtheautomator.com/wp-content/uploads/2024/03/image-183.png) Creating a new group 9\. Provide a descriptive group name (i.e., **My IP Group**) and click **Save** to confirm the new group. ![Naming the new group](https://adamtheautomator.com/wp-content/uploads/2024/03/image-182.png) Naming the new group 10\. Once the group is created, navigate to the **Users** tab and click **New user** to create a new user. Establishing a robust framework by grouping users according to their roles, departments, or other criteria is crucial. This framework helps manage resource access and promote efficient collaboration across your organization. ![Creating a new user](https://adamtheautomator.com/wp-content/uploads/2024/03/image-181.png) Creating a new user 11\. Subsequently, set the user’s Personal information as follows: * Select **IT > Departments > ata > com** from the **Suffix** dropdown to place the user in the IT department. * Under the **Personal** tab (left pane), input **myituser** (arbitrary) in the **Last** **name** field. ![Setting the ne user’s personal information](https://adamtheautomator.com/wp-content/uploads/2024/03/image-180.png) Setting the ne user’s personal information 12\. Configure the new user’s credentials with the following: * Navigate to the **Unix** tab (left pane), and ensure the newly created group’s name (i.e., **My IP Group**) is set as the **Primary Group**. * Click **Set password**, which opens a dialog box where you will set a password for the new user (step 13). ![Initiating setting a password for the new user](https://adamtheautomator.com/wp-content/uploads/2024/03/image-179.png) Initiating setting a password for the new user 13\. Provide a secure password for the new user, and click **OK** to confirm. ![Providing a secure password](https://adamtheautomator.com/wp-content/uploads/2024/03/image-178.png) Providing a secure password 14\. Keep other settings as is, and click **Save** to finalize the creation of the new user account. ![Saving the new user](https://adamtheautomator.com/wp-content/uploads/2024/03/image-177.png) Saving the new user 15\. Revisit the **Tree view** to see the updated structure with the new department (**IT**), group (**My IP Group**), and user account (**myituser**) included. ![Verifying the updated structure](https://adamtheautomator.com/wp-content/uploads/2024/03/image-176.png) Verifying the updated structure ## Installing and Configuring the OpenLDAP Client Now that you have a great server setup, you need a way to interact with it by installing and configuring the OpenLDAP client. Setting up this client is essential for enabling centralized authentication and resource access across your network. Integrating your Ubuntu system with the LDAP directory server establishes a unified authentication mechanism, enhancing security and simplifying user management. To install and configure the OpenLDAP client, follow these steps: 1\. Execute the following `sh` command to add the OpenLDAP server’s hostname and IP address to your client machine to the `/etc/hosts` file, allowing hostname-based communication. Remember to replace `192.168.1.7` and `ldap.ata.com` with your server’s IP address and hostname. ```bash sudo sh -c 'echo "192.168.1.7 ldap.ata.com" >> /etc/hosts' ``` ![Adding the OpenLDAP server's hostname and IP address to the hosts file](https://adamtheautomator.com/wp-content/uploads/2024/03/image-203.png) Adding the OpenLDAP server’s hostname and IP address to the _hosts_ file 2\. Once added, run the below `ping` command to check the connectivity between your system and your OpenLDAP server (_`ldap.ata.com`_). ```bash ping -c3 ldap.ata.com ``` The output below confirms the client machine can successfully communicate with the OpenLDAP server using the specified IP address and hostname. ![Pinging the LDAP server ](https://adamtheautomator.com/wp-content/uploads/2024/03/image-202.png) Pinging the LDAP server Related:[Practical Ping Command in Linux Examples](https://adamtheautomator.com/ping-command-in-linux/) 3\. Next, run the command below to `update` your package lists and `install` the following necessary OpenLDAP client packages: * `libnss-ldap` – Enables your system to use LDAP for common configuration databases. * `libpam-ldap` – Allows system authentication against LDAP directories. * `ldap-utils` – Provides command-line tools for managing LDAP directory entries. * `nscd` – Caches NSS lookups, improving performance by reducing LDAP server queries. ```bash sudo apt update && sudo apt install libnss-ldap libpam-ldap ldap-utils nscd -y ``` During installation, you will get a series of prompts to configure the OpenLDAP client (step four). ![Updating the package lists and installing the necessary OpenLDAP client packages](https://adamtheautomator.com/wp-content/uploads/2024/03/image-201.png) Updating the package lists and installing the necessary OpenLDAP client packages 4\. Now, enter _**ldap://192.168.1.7**_ in the **LDAP server Uniform Resource Identifier** field, which directs the client to your OpenLDAP server. ![Setting the LDAP server Uniform Resource Identifier](https://adamtheautomator.com/wp-content/uploads/2024/03/image-200.png) Setting the LDAP server Uniform Resource Identifier 5\. Input the DN of the search base (i.e., **dc=ata,dc=com**) for LDAP operations. ![Entering the DN of the search base](https://adamtheautomator.com/wp-content/uploads/2024/03/image-199.png) Entering the DN of the search base 6\. Choose **3** for the LDAP version to use for enhanced security and features ![Selecting the preferred LDAP version](https://adamtheautomator.com/wp-content/uploads/2024/03/image-198.png) Selecting the preferred LDAP version 7\. Next, select **Yes** to give the root user database admin privileges. ![Making local root a Database admin](https://adamtheautomator.com/wp-content/uploads/2024/03/image-197.png) Making local root a Database admin 8\. Afterward, choose **No** for root account management to disable the LDAP database login. ![Disabling the LDAP database login](https://adamtheautomator.com/wp-content/uploads/2024/03/image-196.png) Disabling the LDAP database login 9\. Input the LDAP account for root (i.e., **cn=admin,dc=ata,dc=com**). This configuration specifies the admin account for managing LDAP. ![Provide the LDAP account for the root](https://adamtheautomator.com/wp-content/uploads/2024/03/image-194.png) Provide the LDAP account for the root 10\. Provide a strong LDAP root account password (admin password). ![Provide an LDAP root account password](https://adamtheautomator.com/wp-content/uploads/2024/03/image-193.png) Provide an LDAP root account password 11\. After the client configuration, open the _/etc/nsswitch.conf_ file in your preferred editor (i.e., `nano` or [`vim`](https://adamtheautomator.com/vim-for-linux/)) to configure your system’s name service switch. This file decides the pecking order for where the system looks up stuff like user accounts, groups, hosts, and services. Related:[How to Get Started With Gedit Linux](https://adamtheautomator.com/gedit-linux/) 12\. Change the value of the following lines in the _/etc/nsswitch.conf_ file to include the following: `compat` – Refers to local files like _/etc/passwd_. `ldap` – Specifies the use of LDAP. This configuration allows the use of LDAP user authentication and other system functions ``` passwd: compat systemd ldap group: compat systemd ldap shadow: compat ``` ![Allowing the use of LDAP user authentication](https://adamtheautomator.com/wp-content/uploads/2024/03/image-192.png) Allowing the use of LDAP user authentication 13\. Now, open the _/etc/pam.d/common-password_ file, locate and remove the **use\_authtok** option, as highlighted below, save the changes, and close the file. This action lets you adjust the PAM password settings to use the password provided by the user. ![Adjusting the PAM password settings](https://adamtheautomator.com/wp-content/uploads/2024/03/image-191.png) Adjusting the PAM password settings 14\. Additionally, open the _/etc/pam.d/common-session_ file, add the following line and save and close the file. Upon user login, this configuration adds automatic home directory creation to ensure user home directories are created with proper permissions. ```bash session optional pam_mkhomedir.so skel=/etc/skel umask=077 ``` ![Adding automatic home directory creation upon user login ](https://adamtheautomator.com/wp-content/uploads/2024/03/image-190.png) Adding automatic home directory creation upon user login Related:[Special Permissions in Linux: SUID, SGID, & Sticky Bit](https://adamtheautomator.com/special-permissions-in-linux/) 15\. Lastly, run the command below to `restart` the Name Service Cache Daemon (`nscd`) and apply the configuration changes. ```bash sudo systemctl restart nscd ``` ## Checking Your OpenLDAP Setup With everything in place, you must ensure your OpenLDAP server and client configurations work as expected. You will test to confirm your LDAP directory is accessible, that users can authenticate successfully, and that data is being retrieved and updated correctly. To ensure the integrity and functionality of your OpenLDAP server and client setup, perform the following: Execute the following `ldapsearch` command to query your LDAP directory for all user accounts. ```bash ldapsearch -x -H ldap://192.168.1.7 -b "dc=ata,dc=com" ``` You will see an output that looks something like the following, listing out the details of each user. This output tells that the OpenLDAP server responds correctly to your search queries. ![Querying the LDAP directory for all user accounts](https://adamtheautomator.com/wp-content/uploads/2024/03/image-205.png) Querying the LDAP directory for all user accounts Finally, attempt to log in (`su`) to the `myituser` user account. ```bash su - myituser ``` Successful login indicates that the authentication against the OpenLDAP server is working as expected. > 💡 _A successful login message may not always be shown; instead, you might be just logged in and presented with a new command prompt, as shown below. If there are any errors, they will be displayed, and you will remain logged in as the current user._ ![Logging in as the myituser user](https://adamtheautomator.com/wp-content/uploads/2024/03/image-204.png) Logging in as the myituser user ## Conclusion You have done it! Your Ubuntu server now has a fully operational OpenLDAP system with a secure firewall, a PHP-enabled web server, and a sleek LDAP Account Manager interface. Groups and user accounts are set, and your OpenLDAP client is ready to connect. Thus, you can be confident in your server’s performance. Now, take some time to browse the comprehensive [official document page of OpenLDAP](https://www.openldap.org/doc/), packed with valuable tips and tricks. Also, why not consider learning [how to backup and restore your OpenLDAP server](https://ubuntu.com/server/docs/service-ldap-backup-restore) to ensure the safety of your user accounts and configurations? 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