This document is the public draft release of the vSphere 4.1 Security Hardening Guide. This guide is an incremental update to the vSphere 4.0 Security Hardening Guide based on new and changed features of vSphere. Please provide your feedback in the comments section. This draft will remain posted for comments until approximately the end of February 2011.
Link to document: vSphere 4.1 Security Hardening Guide (draft)