VMware released the Security Hardening Guide for vSphere 5.1. This is a draft version.
When implementing virtualization technology, organizations must ensure that they can continue to maintain a secure environment and meet their compliance obligations. To do so, you will have to evaluate risks that might affect protected information and mitigate those risks through risk-appropriate standards, processes, and best practices.
The guide is being released exclusively in spreadsheet format. Many of you have indicated that, although the accompanying text found in previous versions of the guide is interesting, the specific steps for assessment and remediation of the recommendations are really what matters. Since people often end up putting the guide into spreadsheet format anyway, we figure we’d save you the trouble!