This image shows the east-west traffic flow from the web or application to OCI Object Storage and other Oracle Services Network in a regional hub and spoke topology that uses a Check Point CloudGuard Network Security gateway. It includes two virtual cloud networks (VCNs):

• South hub VCN (192.168.0.0/16): The south hub VCN houses the Check Point CloudGuard Network Security high availability cluster. The backend subnet use vNIC2 interface for internal traffic to or from the CloudGuard Network Security gateway. This interface is part of the backend subnet. The south hub VCN communicates with spoke VCNs through a dynamic routing gateway (DRG). The south hub VCN communicates with OCI Object Storage through a service gateway.
• Web or application tier spoke VCN (10.0.0.0/24): The VCN contains a single subnet. An application load balancer manages traffic to the web or application VMs. The application tier VCN is connected to the south hub VCN over the DRG.

East-west traffic flows from the web or application to OCI Object Storage in the following steps:

1. Traffic that moves from the web or application tier to Object Storage is routed through the web or application subnet route table (destination 0.0.0.0/0).
2. Traffic moves from the web or application subnet route table to the DRG for the Object Storage traffic.
3. Traffic moves from the DRG through the south hub VCN ingress route table to the Check Point CloudGuard Network Security gateway in the backend subnet over vNIC2 through the secondary floating IP of vNIC2.
4. Traffic from the Check Point CloudGuard Network Security gateways is routed through the backend subnet route table (destination Oracle Network Services).
5. Traffic moves from the backend subnet route table to the service gateway.
6. Traffic moves from the service gateway to Oracle Services Network, such as OCI Object Storage.