Webmaster in a Nutshell, Second Edition

Chapter 19. Apache Modules

Modules are a key part of Apache. They provide much of the functionality administrators expect in a modern web server, including user tracking, CGI scripting, and authentication. However, we should warn you up front that not all the modules presented here are compiled by default into the Apache server; this can be configured by the administrator when the distribution is first compiled.

Table 19.1 describes the standard Apache modules.

Table 19-1. Apache Modules

Module	Compiled	Description
mod_access	Yes	Access control
mod_actions	Yes	CGI scripting
mod_alias	Yes	Aliasing and filesystem mapping
mod_asis	Yes	Provides for .asis (as is) files
mod_auth	Yes	User authentication
mod_auth_anon	No	Anonymous user authentication
mod_auth_db	No	User authentication with DB files
mod_auth_dbm	No	User authentication with DBM files
mod_autoindex	Yes	Automatic directory listings
mod_browser	No	Setting of environment variables (obsolete)
mod_cern_meta	No	Support for CERN metafiles
mod_cgi	Yes	Execution of CGI scripts
mod_cookies	No	User tracking (obsolete)
mod_digest	No	MD5 user authentication
mod_dir	Yes	Simple directory handling
mod_dld	No	Runtime linking of object modules (obsolete)
mod_dll	No	Runtime linking of object modules (obsolete)
mod_env	No	Environment variable handling
mod_example	No	Example of Apache API usage
mod_expires	No	Automatic expire headers
mod_headers	No	Modification of HTTP response headers
mod_imap	Yes	Image map handling
mod_include	Yes	Server-side includes
mod_info ...