VMware vCloud Networking and Security (vCNS) is a security virtual appliance suite that integrates seamlessly with other VMware products, including:
It is a crucial security component to protect hosts and data centers from security threats and attacks, and also help the administrator achieve compliance goals. Previously, functions of vCNS were included in a dedicated product called vShield, but beginning with vSphere 5.1 VMware, they became part of the vCloud product suite. Therefore, vCNS cannot be bought as a separate product anymore.
The product offers the following components: