| Module | Purpose |
|---|
| mod_antibot | Provides HTTP frequency analyzing and DDoS protection tool. |
| mod_asis | Send files that contain their own HTTP headers. |
| mod_auth_basic | Enables HTTP Basic Authentication. |
| mod_auth_digest | Enables MD5 Digest Authentication. |
| mod_authn_anon | Configure anonymous users access to authenticated areas. |
| mod_authn_dbd | Provides authentication based on look-up in a SQL database. |
| mod_authn_default | Reject any authorization request if no authentication is configured. |
| mod_authn_file | Provide authentication based on user look-up in plain text password file. |
| mod_authz_default | Reject any authorization request if no authentication is configured. |
| mod_authz_groupfile | Allows or denies access to particular areas of the site depending on user group membership. |
| mod_authz_host | Allows access control to parts of the web server based on hostname, IP address or other characteristics of the client request. |
| mod_authz_user | Allows or denies access to portions of the web server for authenticated users. |
| mod_cache | Allows caching local or proxied content. |
| mod_core | Provides the use of Helicon Ape core features. |
| mod_dbd | Allows for the management of SQL database connections. |
| mod_deflate | Enables server output compression. |
| mod_developer | Allows for the debugging of web requests. |
| mod_disk_cache | Allows for the use of a disk-based storage engine for mod_cache. |
| mod_env | Controls the environment provided to CGI scripts and SSI pages. |
| mod_evasive | Allows for the protection of sites from HTTP DoS/DDoS and brute-force attacks. |
| mod-expires | Sets the Expires HTTP header and max-age directive of the Cache-Control HTTP header in server responses in relation to either the time the source file was last modified, or to the time of the client access. |
| mod_filter | Enables the use of context-sensitive content filters. |
| mod_gzip | Allows for the compression of HTTP responses. |
| mod_headers | Modifies HTTP request/response headers. |
| mod_hotlink | Protects content from hotlinking. |
| mod_linkfreeze | Changes links on pages to an SEO-friendly format. |
| mod_log_config | Enables custom logging. |
| mod_logio | Logs the number of bytes sent/received per request. |
| mod_mem_cache | Enables the use of a memory-based storage engine for mod_cache. |
| mod_mime | Associates filename extensions with behavior (handlers and filters) and content (MIME-type, language, character set and encoding). |
| mod_proxy | Applies forward and reverse proxy functions. |
| mod_replace | Allows for the editing of HTML body and HTTP request/response headers. |
| mod_rewrite | Rewrites requested URLs on the fly based on regular expression rules and various conditions. |
| mod_seo | Allows for the creation of SEO-friendly links on pages based on database or mapfile values. |
| mod_setenvif | Sets environment variables depending on whether different parts of the request match specified regular expressions. |
| mod_so | Emulates the functions of loading modules. |
| mod_spelling | Corrects misspelled URLs by performing case-insensitive checks and allowing one misspelling. |
| mod_usertrack | Tracks and logs user activity on the site using cookies. |
| mod_xsendfile | Sends the file specified by the X-SENDFILE header. [5] |
