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Chapter 11. The Apache HTTP Server

11.1. Apache HTTP Server 2.2
11.1.1. Features of Apache HTTP Server 2.2
11.2. Migrating Apache HTTP Server Configuration Files
11.2.1. Migrating Apache HTTP Server 2.0 Configuration Files
11.2.2. Migrating Apache HTTP Server 1.3 Configuration Files to 2.0
11.3. Starting and Stopping httpd
11.4. Apache HTTP Server Configuration
11.4.1. Basic Settings
11.4.2. Default Settings
11.5. Configuration Directives in httpd.conf
11.5.1. General Configuration Tips
11.5.2. Configuration Directives for SSL
11.5.3. MPM Specific Server-Pool Directives
11.6. Adding Modules
11.7. Virtual Hosts
11.7.1. Setting Up Virtual Hosts
11.8. Apache HTTP Secure Server Configuration
11.8.1. An Overview of Security-Related Packages
11.8.2. An Overview of Certificates and Security
11.8.3. Using Pre-Existing Keys and Certificates
11.8.4. Types of Certificates
11.8.5. Generating a Key
11.8.6. How to configure the server to use the new key
11.9. Additional Resources
11.9.1. Useful Websites
The Apache HTTP Server is a robust, commercial-grade open source Web server developed by the Apache Software Foundation ( Fedora 13 includes the Apache HTTP Server 2.2 as well as a number of server modules designed to enhance its functionality.
The default configuration file installed with the Apache HTTP Server works without alteration for most situations. This chapter outlines many of the directives found within its configuration file (/etc/httpd/conf/httpd.conf) to aid those who require a custom configuration or need to convert a configuration file from the older Apache HTTP Server 1.3 format.


If using the graphical HTTP Configuration Tool (system-config-httpd ), do not hand edit the Apache HTTP Server's configuration file as the HTTP Configuration Tool regenerates this file whenever it is used.

11.1. Apache HTTP Server 2.2

There are important differences between the Apache HTTP Server 2.2 and version 2.0.
This section reviews some of the features of Apache HTTP Server 2.2 and outlines important changes. If you are upgrading from version 1.3, you should also read the instructions on migrating from version 1.3 to version 2.0. For instructions on migrating a version 1.3 configuration file to the 2.0 format, refer to Section 11.2.2, “Migrating Apache HTTP Server 1.3 Configuration Files to 2.0”.

11.1.1. Features of Apache HTTP Server 2.2

Apache HTTP Server 2.2 features the following improvements over version 2.0 :
  • Improved caching modules (mod_cache, mod_disk_cache, mod_mem_cache).
  • A new structure for authentication and authorization support, replacing the authentication modules provided in previous versions.
  • Support for proxy load balancing (mod_proxy_balancer)
  • support for handling large files (namely, greater than 2GB) on 32-bit platforms
The following changes have been made to the default httpd configuration:
  • The mod_cern_meta and mod_asis modules are no longer loaded by default.
  • The mod_ext_filter module is now loaded by default.
If upgrading from a previous release of Fedora, the httpd configuration will need to be updated for httpd 2.2. For more information, refer to