I need documentation on ASP.Net security models

Are there any documents on how ASP.Net security works? Basically I'm
looking for a low-level understanding of what has to access where using
what role in what manner during a .aspx page call.

I'd like a breakdown of how it works for *each* authentication mode, though
I'm currently troubleshooting a basic authentication using impersonation
problem.

I have to figure out what permissions and policies have to be set where to
get this server working. Who needs to be able to log on from the network?
What accounts need to be able to log in locally or as a service? What
directories does who need which access to, etc?

Thanks,
Philo

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