Which Aviatrix feature allows customers to group VPC/VNETs with common security properties for access?

The feature that enables customers to group VPC/VNETs with common security properties for access is Security Domains. This functionality allows organizations to define specific security requirements and policies that can be uniformly applied across different cloud environments. By creating Security Domains, customers can ensure that their network traffic adheres to compliance standards and security policies, facilitating more efficient management of resources.

The concept of Security Domains is particularly beneficial for organizations operating in multiple clouds, as it provides a consistent framework for managing access and security across diverse infrastructures. By grouping VPCs or VNETs with similar security considerations, users can streamline their network design and maintain better control over traffic flows and data governance.

While other options are relevant to networking, they do not specifically address the requirement for grouping resources based on shared security properties. FireNet deals with the segmentation of firewalls and security policies, Site 2 Cloud typically refers to connectivity solutions for extending on-premises networks to the cloud, and Cloud WAN focuses on wide-area network solutions rather than the specific grouping of resources. Thus, Security Domains is the most fitting choice for fulfilling the described purpose.