I am using Tomato 1.27. With Access Restrictions you can black list some web sites to block access to them. I am looking for an access rule that works the opposite. Access is only allowed to sites that are specifically listed. Is there another firmware that can easily do this from a GUI?
I believe one of the newer Tomato versions does this. You should try the Toastman mod initially, but more information can be available at the Tomato forum at linksysinfo.org where the developers and large Tomato community reside.