Fixing this is pretty easy. Just add a new authorization
rule to your root web.config site that grants access to the stylesheet and/or
other file resources that you want to allow anonymous access to. For
example, the below configuration section denies access to all resources except
Alternatively, if you have a directory with a lot of static
files in it, you can just add a web.config file at its root and add a global
authorization rule like above allowing access to it.
Hope this helps,