I'd like to be able to point some computers' dns server designation to a dns server that only allows/translates the hostnames of my choosing. These computers are only to be able to access a very limited amount of domain names. My question, specifically, is: Is there a service that functions similarly to how ScrubIT.com's service but that gives me access to the allowable hostnames? I considered leaving the DNS entries blank and modifying the hosts file but one of the sites does not just have a single IP address to resolve to.
Also, and maybe as an alternative, can you give me recommendations to some client-side applications that would accomplish what I'm needing? I looked into GFI's web monitor but it is basically a web-proxy server that I would have to maintain on my own site.
(I'm surprised I can't find a zone for 'filtering' or 'web filter' to be assigned to!)