Virtualization and software-defined network (SDN) security are rapidly transforming data centers into agile, innovative, software-defined, and cost-effective private clouds. Yet, security is often an afterthought when it comes to private cloud deployments. Traditional security cannot keep up with these new environments, creating security gaps or manual security processes that negate the benefits of virtualization and SDN firewalls. A private cloud requires a software-defined approach to security due to the lack of visibility posed by east-west traffic and virtualized services. Private cloud and software-defined data center (SDDC) assets need advanced protection from evolving threats, both known and unknown.