I've setup custom errors and it's working, But in some cases IIS does not recognize the file extension and therefore does not even process the page...
For example: http://example-web-site.com/page.aaa
So, ".aaa" is not recognized and IIS shows an ugly error page HTTP Error 404.0 - Not Found The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.
How can I handle all (unknown extensions) so I can still capture every hit to the web site and do something with it or show my custom error page?