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Apache HTTP Server

The Apache HTTP Server, commonly referred to as Apache, is the world's most widely used web server software. Developed and maintained by the Apache Software Foundation, Apache has been a cornerstone of the web since 1995, powering millions of websites worldwide.

Key Features

Modular Architecture

Extensive module system allowing for flexible functionality through loadable modules.

Multi-Processing Modules

Multiple MPMs (prefork, worker, event) for different performance characteristics.

.htaccess Support

Per-directory configuration files for flexible, decentralized configuration management.

Rich Authentication

Comprehensive authentication and authorization modules including LDAP, database, and file-based auth.

Use Cases

  • Traditional Web Hosting: Shared hosting environments with .htaccess support
  • Dynamic Content: PHP, Python, Perl, and other server-side languages
  • Content Management: WordPress, Drupal, and other CMS platforms
  • Reverse Proxy: Using mod_proxy for load balancing and proxying
  • SSL/TLS Termination: Secure connections with mod_ssl

Configuration Example

A basic Apache virtual host configuration:

<VirtualHost *:80>
    ServerName example.com
    DocumentRoot /var/www/html
    
    <Directory /var/www/html>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

Advantages

  • Mature and stable with decades of development
  • Extensive module ecosystem
  • Flexible configuration system
  • Excellent documentation and community
  • Cross-platform support

Official Resources