Greetings, colleagues!
Many of you work with the 
Citrix XenServer 5.6 operating system.
Citrix offers a very limited set of security configuration documents. It consists of the 
Common Criteria Documents and 
User Security Guide . Full 
Security Guide or 
CIS Benchmark are absent.
To solve this problem, the experts at 
Positive Research Research Center analyzed the operating system Citrix XenServer 5.6. The result of the work was the document 
“Positive Technologies: Citrix XenServer 5.6 Free / Advanced Hardening Guide (Public Beta)” . I hope it fills the gap in the documentation for this operating system in the field of information security.
The document is ready for open beta testing, which will last until 04/30/2012.
Please do not test on production-servers.
Remember that all operations you perform at your own risk.
Since I was directly involved in the development of this document, I ask your comments and suggestions to send to 
KErmakov (at) ptsecurity.ruWe thank the user 
amarao for his contribution to the preparation of this document.