About the filter lists, groups and policies
Portal users can add or remove domains and search terms from web filter lists. A filter list is a collection of URLs, domains, phrases, lists of file types, security rules, or any combination of these. The Smoothwall Filter comes installed with a range of Standard Categories. Your Smoothwall administrator can define new categories of content for use in web filter policies to suit your organization's needs. Within the Smoothwall User Portal, you can add or remove URLs, domains, and phrases from filter lists, but you can't add or remove filter lists themselves.
A filter list group is a collection of categories, made up of URLs, domains, phrases, lists of file types, security rules, or any combination of these. The Smoothwall Filter uses these groups in web filter policies to determine if a user should be allowed access to the content they have requested using their web browser. You can change the categories in existing category groups.
You can view those web filter policies that you configured on the Smoothwall Filter, within the Smoothwall User Portal. the Smoothwall Filter checks for a matching web filter policy using a top-down approach. Once a match is found, no further checks are made.