Apache Http Server - Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual

Chapter 22.

Apache HTTP Server

The Apache HTTP Server is a robust, commercial-grade open source Web server developed by the
Apache Software Foundation (http://www.apache.org/). Red Hat Enterprise Linux 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.
Warning
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.
22.1. Apache HTTP Server 2.2
There are important differences between the Apache HTTP Server 2.2 and version 2.0 (version 2.0
shipped with Red Hat Enterprise Linux 4 and earlier). 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
HTTP Server 1.3 Configuration Files to
22.1.1. 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 Red Hat Enterprise Linux, the httpd configuration will
need to be updated for httpd 2.2. For more information, refer to http://httpd.apache.org/docs/2.2/
upgrading.html
2.0".
Section 22.2.2, "Migrating Apache
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