The Data Security Management Server is a Windows-based machine where you install the Websense Data Security software. This machine provides the core information loss technology, capturing fingerprints, applying policies, and storing incident forensics. You can install multiple Data Security servers, sharing the analysis load, but one must be the primary, management server.
There is a policy engine on all Websense Data Security servers, Web Security Gateway proxies, and Email Security Gateway appliances. The policy engine is responsible for parsing your data and using analytics to compare it to the rules in your policies.