If you want to make this for a single page you can set it as a home page and
Under <cms> node of the web.config could you add the following property
If you want to do this for multiple directories you need to consider using rewriting or redirect.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items