Openldap Slapd Php Nginx Ldap Centos

Openldap Slapd Php Nginx Ldap Centos

What is OpenLDAP

OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP) and is offered by the OpenLDAP project. OpenLDAP is a powerful, open-source directory service used to store and manage user, group and computer information, including passwords. It is based on the open source computer language Lightweight Directory Access Protocol (LDAP) and is an alternative to Microsoft Active Directory.

OpenLDAP is considered an enterprise-class directory service, meaning it can be scaled to manage large numbers of users, groups, and computers. It can integrate with existing authentication and authorization systems, allowing organizations to reduce their reliance on security administration tools from third-party sources. Additionally, OpenLDAP is extensible and supports customization features, making it possible for organizations to tailor the directory service to their own IT needs.

What is SLAPD

SLAPD is a server daemon program or process that provides access to data stored in an LDAP directory. SLAPD stands for Simple Lightweight Access Protocol Daemon. It is an open-source version of the Lightweight Directory Access Protocol (LDAP) server. SLAPD is used to store, update, and manage information in a hierarchical directory structure. It can be used to store user accounts, store passwords and other information, provide network authentication and authorization, or provide access to other resources such as databases and domain controllers.

SLAPD is a critical component of many open-source services and products, including e-mail servers, application servers, databases, and even filesystems. It is also used extensively in large enterprise networks for managing user accounts and access controls. SLAPD is highly scalable, supports standard network protocols such as LDAP and Kerberos, and is often used in conjunction with other software such as PostgreSQL, Apache Web servers, and PHP.

PHP and Nginx

PHP is a server-side scripting language used for web development, popularly known for its use with MySQL, an open-source relational database. PHP stands for “Hypertext Preprocessor” and can be embedded directly into HTML documents. It allows developers to dynamically generate webpages in response to requests from clients, making it a popular language for web applications. It is available in the form of a server module, CGI binary, and a command-line interpreter.

Nginx is an open-source, high-performance web server software written in C. It is known for its small size, high performance, and robust feature set. Nginx is mainly used to host webpages, serve files, and act as a reverse proxy, though it also supports streaming media, mail, and other functions. Its extensible configuration language makes it easy to customize and extend, and its built-in support for SSL/TLS makes it ideal for secure web applications.

Ldap and Centos

LDAP stands for Lightweight Directory Access Protocol. It is a public standard for accessing and managing directory data. It is based on TCP/IP and is used in many large enterprise networks to store, update and share user and group information. It is also used in many popular applications and services, such as Microsoft Active Directory, Novell eDirectory and Sun Java System directory server.

CentOS is an open-source Linux operating system, derived from Red Hat Enterprise Linux. It is a community-developed, supported and maintained OS and provides enterprise-level features at no cost. CentOS is popular due to its combination of stability, security and wide array of compatible software packages. It is an ideal OS for web hosting, application hosting and server consolidation.

Openldap-Slapd-PHP-Nginx-Ldap-CentOS: Connecting to LDAP from a Centos-based System

Connecting to an LDAP directory from a Centos system is a straightforward process, once the necessary software is available on the system. OpenLDAP is installed as part of the CentOS base package and the Slapd service is also available. The Nginx and PHP packages can be installed via the yum package manager and LDAP is enabled by default. The following steps should be followed to connect to an LDAP directory from a Centos system:

  • Install the required software packages: Nginx, PHP and OpenLDAP.
  • Configure the Nginx and PHP servers to use LDAP.
  • Configure the OpenLDAP Slapd service to allow connections from the Centos system.
  • Install the php-ldap module.
  • Open the directories for reading and writing.
  • Create a user for the ldap directory.
  • Test the connection from the Centos system.

Once the connection has been tested, applications can be written and tested using the php-ldap module. These applications can then be used to access, manage and update data stored in an LDAP directory.


Using OpenLDAP, Slapd, php, Nginx and CentOS, it is possible to quickly and easily connect to an LDAP directory from a Centos-based system. This approach gives developers the flexibility to create and manage applications using the standard LDAP APIs and to add authentication and authorization capabilities to the application. With a few simple steps, organizations can begin utilizing the OpenLDAP directory service in their environment.

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