User's Guide - Websense Knowledge Bases

CHAPTER 2Establishing Filtering PoliciesWhen you enter your subscription key, Websense Express starts to downloadthe Websense Master Database. This database includes the URL category andprotocol definitions that form the basis for Internet usage filtering.Once the database download process is complete, Websense Express beginsfiltering Internet requests using the Default policy. This policy applies to allclients whenever no other policy applies. Initially, the Default policy appliesthe Basic Security URL category filter and Typical protocol filter. The Basic Security URL category filter blocks sites in URL categoriesthat are considered serious security risks, such as Malicious Software andKeyloggers. It does not block sites in other categories, even those likeAdult Material and Gambling that may pose legal liability or productivityrisks. The Typical protocol filter blocks protocols in the Instant Messaging /Chat, P2P File Sharing, and Proxy Avoidance protocol groups.Understanding filtering policiesWebsense Express filtering is based on policies. A policy is a schedule thatdetermines how URL categories and protocols are filtered at certain times.Policies can include a combination of the following:URL category filters apply a filtering action to each URL categoryApproved URL lists define specific sites that users can accessProtocol filters apply a filtering action to each protocolURL category filters, approved URL lists, and protocol filters are scheduledinto policies by time of day and day of week.Websense Express User Guide 25