Apache2/APACHE2 MODULES

Apache2 TOC

Overview Installation Configuration Security SSL Certificates SSL and Name Based Virtual Hosts Modules APACHE2_MODULES mod_authnz_external mod_python Add-ons PHP

First time users of Apache may be a little overwhelmed by the sheer number of available modules. This article seeks to provide a short overview of what function each module performs and why you may want to use it.

For a details on each module, read the official Apache 2.2 Module Documentation.

[edit] Configuration

The modules in this list should appear, and may be modified, in /etc/make.conf under APACHE2_MODULES="...". If it is not present, it may simply be added:

The following list may be seen by running the command,

This may be more up to date than the following list.

[edit] Module List

• actions: Execute a CGI script based on a request media type or method. This'll let you run Perl scripts.
• alias: Map URL's to different locations on the filesystem. Simple URL redirection.
• asis: Sends files that contain their own HTTP headers.
• auth_basic: Basic authentication. Needs an authn_* module to be useful.
• auth_digest: Username/password authentication using MD5 digests.
• authn_alias: Create extended authentication providers based on actual ones.
• authn_anon: Anonymous access; similar to FTP.
• authn_dbd: Authentication using an SQL database.
• authn_dbm: Authentication using DBM files.
• authn_default: Fallback authentication module, rejects all credentials.
• authn_file: Authentication using plain-text files.
• authz_dbm: Group authorization using DBM files.
• authz_default: Fallback authorization module, rejects all credentials.
• authz_groupfile: Group authorization using plain-text files.
• authz_host: Group authorization using host (name or IP).
• authz_owner: Authorization based on file ownership information.
• authz_user: Authorization based upon user (Require <username>).
• autoindex: Automatic directory indexes (Options +Indexes).
• cache: Content caching, requires a *_cache module to be useful.
• cern_meta: CERN httpd metafile information.
• charset_lite: Experimental. Convert to a specified character set before transmission.
• dav: Enables WebDAV.
• dav_fs: filesystem provider for WebDAV.
• dav_lock: Locking provider for WebDAV.
• dbd: Manages SQL database connections.
• deflate: Compress content before transmission.
• dir: Trailing-slash redirects and directory index files (index.html, et cetera)
• disk_cache: Disk-based caching, used with the cache module.
• dumpio: Dump I/O to the error log.
• env: Modify environment passed to CGI and SSI scripts.
• expires: Controls expires and cache-control headers.
• ext_filter: Pass server output through an external program before transmission.
• file_cache: Cache a static list of files in memory.
• filter: Allows use of output filters (e.g., mod_deflate).
• headers: Customise HTTP request & response headers.
• ident: RFC 1413 IDENT lookups.
• imagemap: Server-side imagemap processing.
• include: Server Side Includes (SSI).
• info: HTTP-accessible overview of server configuration.
• log_config: Basic logging of server requests.
• log_forensic: Forensic logging of server requests.
• logio: I/O logging of server requests.
• mem_cache: Memory-based caching, used with the cache module.
• mime: Associates a filename's extension with its behaviour.
• mime_magic: Determine a MIME type by looking at the file.
• mod_pagespeed: Google apache module pagespeed
• negotiation: Content negotiation.
• proxy: Proxy/gateway server.
• proxy_ajp: AJP support for proxy module.
• proxy_balancer: Load balancing for proxy module.
• proxy_connect: CONNECT support for proxy module.
• proxy_ftp: FTP support for proxy module.
• proxy_http: HTTP support for proxy module.
• rewrite: Advanced URL rewriting engine.
• setenvif: Conditional environment variable setting.
• speling: Attempt to correct misspelled URL's.
• status: HTTP-accessible information on server activity and performance.
• substitute: Perform search-and-replace on output before transmission.
• unique_id: Provide an environment variable with a unique identifier for each request.
• userdir: User-specific directories. (http://www.example.com/~username/)
• usertrack: Clickstream logging of user activity.
• version: Apache version dependent configuration
• vhost_alias: Virtual hosts.