restrict internet access to certain sites

[Ish]

Hi

We need to restrict internet access for certain users to websites that we specify only regardless of which pc they log on to.

We are using SBS 2003.

How can we do this for a sensible cost? We have about 12 pc's in total.

Thanks

 

[Ish]

If using openDNS how will it allow user 1 to access a certain list of sites, user 2 another list, user 3 any site etc?