NAT Gateway

The Network Address Translation (NAT) Gateway allows VMs, inside a Virtual Data Center (VDC), to access the Internet, without requiring a public network interface. The NAT Gateway can act as a default gateway for private networks. This allows VMs to initiate connections to the Internet and receive a response, but not to receive inbound connections initiated from the Internet. VMs are “hidden” from the Internet and thereby are not exposed to Internet threats.