On Mon, Aug 06, 2007, Neil A. Hillard wrote: > I can't see how it's a shortcoming of the protocol. If the browser > isn't aware that there is a proxy then why would it (why should it) try > to authenticate to one? Tell it that a proxy exists and it's more than > happy to authenticate. > > Interception is less than ideal. Look at how a browser talks directly to an origin server when presenting (HTTP Basic) authentication credentials, and what a proxy ends up doing with those. Adrian