A core mission for the Defense Information Systems Agency (DISA) Field Security Operations (FSO) is to secure Department of Defense (DoD) Computing systems. The processes and procedures outlined in this Security Technical Information Guide (STIG), when applied, will decrease the risk of unauthorized disclosure of sensitive information. Security is clearly still one of the biggest concerns for our DoD customers, for example, the war fighter.This STIG was developed to enhance the confidentiality, integrity, and availability of sensitive DoD Automated Information Systems (AIS).ESX Server infrastructures must provide secure, available, and reliable data for all customers. This document will assist sites in meeting the minimum requirements, standards, controls, and options that must be in place for ESX Server infrastructures.