Oracle Cloud Infrastructure supports private access from your on-premises network to a database with virtual cloud network (VCN) Transit Routing.
Transit routing refers to a network setup in which your on-premises network uses a connected virtual cloud network (VCN), through a service gateway on the VCN for connectivity to a database. You connect the on-premises network to the VCN with FastConnect or VPN Connect, and then configure the VCN routing so that traffic transits through the VCN to a database beyond the VCN.
After transit routing is configured, there are no special steps required to access Oracle Application Express or SQL Developer Web, or to consume RESTful services published in Oracle REST Data Services.
See Transit Routing: Private Access to Oracle Services for more details and options available with Transit Routing.
See VPN Connect for more information on VPN Connect.