Playing with HTTP.SYS parameters ...
HTTP.SYS is the new kernel mode http driver that ships with IIS 6.0. Can check my other post on IIS 6.0 Features listing. If you want to play around with the different parameters that it uses then you need to get into the registry. Read through the KBV article posted from MS on this ...
INF: Http.sys Registry Settings for IIS
Play with these parameters with care ... These are very sensitive data ...
(via Richard Ersek's Blog)