Apache: The Definitive Guide, 3rd Edition

Status

In a similar way, Apache can be persuaded to cough up comprehensive diagnostic information by including and invoking the module mod_status:

AddModule modules/standard/mod_status.o

This produces invaluable information for the webmaster of a busy site, enabling her to track down problems before they become disasters. However, since this is really our own business, we don’t want the unwashed mob out on the Web jostling to see our secrets. To protect the information, we therefore restrict it to a whole or partial IP address that describes our own network and no one else’s.