dns filter software

[jason2s]

hi,
i looking for a software already created or a way to build a software
to perform the following task:

filter all sites that a network try to acess and if the web site if not
in white list the acess will be blocked.
any one know a software that run in windows that can do this or a way to creat one?
thanks for your help

[EINSTEIN_007]

You can download something like the DNS Redirector software that is designed for wireless hotspots, hotels, cafes, schools and libraries, but applicable on any network, even at home with one or multiple PCs. Use it to show users a welcome, advertisement, or terms and conditions page the first time they try to browse the Internet on your network. Choose to redirect any domain name matching your keywords list to a blocked or access denied page.