Apache > HTTP Server > Documentation > Version 2.4 > Modules

Apache Module mod_info

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Description:Provides a comprehensive overview of the server configuration
Module Identifier:info_module
Source File:mod_info.c


To configure mod_info, add the following to your httpd.conf file.

<Location "/server-info">
    SetHandler server-info

You may wish to use mod_authz_host inside the <Location> directive to limit access to your server configuration information:

<Location "/server-info">
    SetHandler server-info
    Require host example.com

Once configured, the server information is obtained by accessing http://your.host.example.com/server-info




Security Issues

Once mod_info is loaded into the server, its handler capability is available in all configuration files, including per-directory files (e.g., .htaccess). This may have security-related ramifications for your site.

In particular, this module can leak sensitive information from the configuration directives of other Apache modules such as system paths, usernames/passwords, database names, etc. Therefore, this module should only be used in a controlled environment and always with caution.

You will probably want to use mod_authz_host to limit access to your server configuration information.

Access control

<Location "/server-info">
    SetHandler server-info
    # Allow access from server itself
    Require ip

    # Additionally, allow access from local workstation
    Require ip

Selecting the information shown

By default, the server information includes a list of all enabled modules, and for each module, a description of the directives understood by that module, the hooks implemented by that module, and the relevant directives from the current configuration.

Other views of the configuration information are available by appending a query to the server-info request. For example, http://your.host.example.com/server-info?config will show all configuration directives.

Only information relevant to the named module
Just the configuration directives, not sorted by module
Only the list of Hooks each module is attached to
Only a simple list of enabled modules
Only the basic server information

Dumping the configuration on startup

If the config define -DDUMP_CONFIG is set, mod_info will dump the pre-parsed configuration to stdout during server startup. Pre-parsed means that directives like <IfDefine> and <IfModule> are evaluated and environment varialbles are replaced. However it does not represent the final state of the configuration. In particular, it does not represent the merging or overriding that may happen for repeated directives.

This is roughly equivalent to the ?config query.


Known Limitations

mod_info provides its information by reading the parsed configuration, rather than reading the original configuration file. There are a few limitations as a result of the way the parsed configuration tree is created:


AddModuleInfo Directive

Description:Adds additional information to the module information displayed by the server-info handler
Syntax:AddModuleInfo module-name string
Context:server config, virtual host

This allows the content of string to be shown as HTML interpreted, Additional Information for the module module-name. Example:

AddModuleInfo mod_deflate.c 'See <a \

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