The most straightforward approach for increasing security by disabling password authentication and moving to key-based SSH on a Nutanix cluster involves:
* C. Enable Cluster Lockdown and provide an RSA key: Cluster Lockdown mode restricts management access to the cluster, ensuring that only key-based SSH authentication is used to access the CVM and AHV hosts, enhancing security by eliminating the use of passwords.
References:
* Nutanix Bible (https://www.nutanixbible.com), particularly sections discussing secure access and authentication methods.
* Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), where security features like Cluster Lockdown are covered.