Protect Virtual Data Centers Against Advanced Threats Symantec Critical System Protection currently protects ESX ® guest and hypervisors with granular, policy-based controls. Symantec plans to add support for VMware vSphere 5 in Spring 2012, leveraging out-of-the-box VMware-prescribed server security policies for ESXi and VMware vCenter™ that will enable organizations to identify server compliance violations and suspicious activity in real-time, limit administrative control, restrict network communications and prevent file and configuration tampering of the virtual infrastructure. Because Symantec Critical System Protection is a non-signature, policy-based technology it also allows organizations to stop unauthorized services from running on servers and protect against zero-day attacks, without impacting system performance.