I am currently writing the authentication & authorization chapters of my book…the little ShowContexts.aspx page is invaluable for testing – and I even extended it a little bit and added client certificate support – so now it shows:
- authentication & impersonation configuration settings
- process identity
- thread identity (if impersonating)
- Context.User
- IIS authentication outcome used by FileAuthorizationModule
- client certificate
leastprivilege.com 