Websense Enterprise itself must run on an NT or Solaris server. However your users can be using Macintosh computers or Novell server attached computers. Some Web servers can be configured to host more than one Web site or unique domains. These Web sites are called virtual hosts and share a single IP address. That means that each of these virtual hosts resolves via DNS to the same IP address.
Virtual hosts require special categorization in order to be properly identified and screened.
Otherwise, the system would lump sites that had no commonality into one over broad category. The latest version of Websense recognizes and handles these virtual hosted sites. Websense Enterprise keeps track of all the IP addresses it sees using the Websense Enterprise proxy services. It limits the number of different machines that can use Websense by the license level. Thus only 100 machines with different IP addresses can use the 100 user version of Websense Enterprise.