There is a Monash Default 404 error page. The type of file depends on the filename extension. Unrecognized file extensions are treated as text data, and corrupted on download. It is possible to restrict who can access it even further Staff only Students only By Subject enrolment Specific individuals See the ITS documentation on MDS HTTP Authentication For restricting access so that non-Monash people can access it, consider AuthUserFile . See the Apache documentation on the Redirect statement for detailed information.
Regular expressions are very extensive.
Mastering Regular Expressions . The Apache URL Rewriting Guide is strongly recommended. Typical problems are presented along with their solution. Consult the Apache Directives Documentation .