How To Create Rules

i have server windows 2003.

ISS 6.
PHP 5.x
MySQL 5.0

how to create rules with ip/5hit/s is black list and auto ban ip with IPSec.

when test attack file .php
info test :
using code attack files.
attack file test.php ( code files : <?php echo "we are test" ; ?> )
Ex : attack files test.php ( http://mydomain.php/test.php )
attack 200hit/s ( all files .php is not run ) php application is hang.

also wherewith code attack. i tested asp, html. it isn't problem. ( 1879hit/s ) ( good working)

how to create rules ban ip with 5hit/s?