I have several old Pentium PCs that are gathering dust. I realize I could use Smoothwall to convert one of these old PCs to a firewall. But what I really want to see in a firewall is site filtering. Smoothwall does not appear to support such a feature. That is, the ability to block access to adult web sites. The filtering can be primitive, such as building a blacklist by inputing keywords that would block user access to the site if the keyword appeared in a URL.
Is this possible?
I realize that hardware firewall solutions exist out there, but they often charge $25 per month for this service, but this seems like overkill for my needs.