website security issue

Question

Hi all,
I am creating a website and the home page of website is complete.Now I want that when the user clicks on the menu bar like on home page or aboutus page,he gets navigated to the particular page.But when he manually enter the page name on the address bar of the website,then he should not navigate to that page entered rather,he should stay on the home page.
Is there any solution to this problem.
thanks