Module | Min. Apache V2 Version | Included | What does it do? | Reasons to include/exclude |
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Default | Most | Reallyall | Few |
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mod_access_compat | 2.4 | Yes |
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| | Control access based on client hostname, IP address or other characteristics of client request |
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mod_actions | 2.0 | No |
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| Lets you run CGI scripts when a particular file or method is used in a request | Exclude if not using CGI scripts or have no need to execute scripts conditionally based on requests. XSS vulnerability considerations. If included, ensure request parameters are not considered when making decisions based on content type |
mod_alias | 2.0 |
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| Used for simple URL manipulation tasks, including mapping URLs to filesystem paths and standard redirection. |
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mod_allowmethods | 2.4 |
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| Restricts what HTTP methods can be used on a server |
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mod_asis | 2.0 |
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| Allows you to send a document without adding the usual HTTP headers |
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mod_auth_basic | 2.2 |
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| Used to restrict access with HTTP Basic Auth. Should be combined with at least one authentication module and one authorization module. | If this type of authentication is required, it is nearly imperative to use SSL as passwords are sent as almost plain text (base4 encoded). |
mod_auth_digest | 2.0 |
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| Used to implement HTTP Digest Auth. | If this type of authentication is required, it is nearly imperative to use SSL as an attacker can force the browser to downgrade to basic auth. The passwords are stored unsecurely on the server. |
mod_auth_form | 2.4 |
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| Allows the use of an HTML login form to restrict access | Depends on mod_session modules and makes use of HTTP cookies, which is susceptible to XSS attacks. |
mod_authn_anon | 2.2 |
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| Authentication - Provides anonymous user access to authenticated areas |
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mod_authn_core | 2.4 |
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| Authentication - Provides core authentication capabilities |
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mod_authn_dbd | 2.2 |
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| Authentication - Provides authentication against SQL tables |
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mod_authn_dbm | 2.2 |
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| Authentication - Provides authentication against dbm password files |
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mod_authn_file | 2.2 |
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| Authentication - Provides authentication against plain text password files |
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mod_authn_socache | 2.4 |
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| Authentication - Maintains shared object cache of authentication credentials |
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mod_authnz_fcgi | 2.4[.10] |
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| Authorization - FastCGI authorizer application |
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mod_authnz_ldap | 2.2 |
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| Authorization - Provides authorization through an LDAP directory |
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mod_authz_core | 2.4 |
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| Authorization - Provides core authorization capabilities |
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mod_authz_dbd | 2.4 |
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| Authorization - Provides group authorization based on SQL database |
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mod_authz_dbm | 2.2 |
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| Authorization - Provides group authorization based on dbm files |
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mod_authz_groupfile | 2.2 |
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| Authorization - Provides authorization against plain text files |
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mod_authz_host | 2.4[.19] |
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| Authorization - Provides authorization based host (name or IP) |
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mod_authz_owner | 2.2 |
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| Authorization - Provides authorization based on file ownership |
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mod_authz_user | 2.2 |
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| Authorization - Provides authorization based on authenticated user |
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mod_autoindex | 2.0 |
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| Generates directory indexes |