<a href="http://h30499.www3.hp.com/t5/Fortify-Application-Security/Bypassing-web-application-firewalls-using-HTTP-headers/ba-p/6418366">http://h30499.www3.hp.com/t5/Fortify-Application-Security/Bypassing-web-application-firewalls-using-HTTP-headers/ba-p/6418366</a>