How to restrict Aerospike data in a cluster to the VPN in which it exists

Feature Discussion Security
1

I have 4 nodes inside a VPN configured with mesh heartbeats. Is there a way to restrict the data so that it is not available to the entire Internet but only the machines that exist in that VPN.

Please excise me if this is a duplicate question, I couldn’t find any other question related this problem here.

Thanks in advance