You place an SSI tag on your webpage and then whenever the page is loaded a database is updated with that persons IP in it. This is useful for security purposes especially on credit card orders! The database will log the hostname on the page, the IP on the page and time it was requested - obviosuly the page name and path is logged too. There are two modes of operation, administrators can either choose text based databases or MySQL based databases. This allows for the administrator to have a site ideally suited to him which grows with his/her requirements.