You need to minimizes the number of modules that are compiled directly into the nginx binary. This minimizes risk by limiting the capabilities allowed by the webserver. You can configure and install nginx using only required modules. For example, disable SSI and autoindex module you can type:
# ./configure –without-http_autoindex_module –without-http_ssi_module
# make
# make install
Type the following command to see which modules can be turn on or off while compiling nginx server:
# ./configure –help | less
Disable nginx modules that you don’t need.