There are many reasons some cloud architects might want to use Openswan IPsec VPN in place of the default VPN service provided by Cloud Service Providers (CSP).The main reason for using Openswan is to leverage features such as X.509 digital certificates that are not available in some CSP platforms.
The following video shows how to set up Openswan in Oracle Cloud Infrastructure.
The video shows how to set up Openswan in OCI. The Openswan VPN gateway is then connected to the Corente Service Gateway on OCI Classic. This scenario enables customers to create a secure IPsec VPN between Oracle OCI and OCI Classic cloud platforms.
Terraform GitHub Repository