To ensure that only application servers from the source subnet 10.79.1.0/24 can access the SQL databases running on the NC2 cluster in the subnet 10.78.1.0/24, the administrator can take the following actions:

Option A: Create a custom Security Group with the following rules:

Key = tag:nutanix:clusters

Key = tag:nutanix:clusters:external

and value = the clusters ' UUID

Key = tag:nutanix:clusters:external

and value = 10.78.1.0/24

Option D: Create a custom Security Group with the following:

Key = nutanix:clusters

Key = nutanix:clusters:external

and value = the clusters ' UUID

Key = nutanix:clusters:external

and value = 10.79.1.0/24

These actions help create security rules that restrict access to the databases only from the specified source subnet, ensuring secure and controlled access.

Nutanix Cloud Clusters on AWS Administration

AWS Security Groups Documentation