protecting directories from people navigating into them

Hi,

Over and above the forms authentication protection in the web.config file, I want to stop people being able to actually navigate their way into any given directory.

How can I do this?

Thanks

Paul

 

Thanks for that,

But it seems to stop all access to that download now, even if i use a link to refer to it.

is there a way to free up access if accessing through a link?

thanks

Paul