This image describes the implementation of Oracle Real Application Clusters in Oracle Audit Vault and Database Firewall. Starting from the top left, there are clients. They connect to Database Firewall instances to the bottom of the clients through a Management Interface. The Database Firewall instances have enforcement points configured.

The clients connect to a RAC SCAN Listener. The SCAN Listener connects to multiple RAC instances to the extreme right. The Database Firewall instances on the left are also connected to the RAC instances on the right.

A table at the bottom of the image contains a list of IP Addresses, Local DNS, and Server DNS.