I have an IIS site and I put a default document (default.aspx) on the root of the site. If I browse to mysite.com/default.aspx it will work. However, if browse to mysite.com, I get a 401.3 - unauthorized error.
The default document is already set in iis. I also tried setting system.webServer...defaultDocument in the web.config and that did nothing.
HTTP Error 401.3 - Unauthorized
You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings for this resource on the Web server.