This appendix summarizes the available Nginx modules, as of stable Version 1.2.9. For each module, a brief description is provided as well as some particular characteristics and a reference to the chapter where you will be able to find more information. The modules are listed in alphabetical order.
Modules marked with a * are optional modules, which are not included when you build Nginx without extra configure switches. The appropriate configure switch to enable or disable modules is detailed with each module.
Allows you to grant or deny access to a resource, based on an IP address or address range.
--without-http_access_module disables the module
Chapter 4, Limits ...