What Is NAT Gateway?
NAT Gateway is a network address translation (NAT) service. It enables cloud and on-premises servers to share elastic IP addresses (EIPs) to access the Internet or to provide services accessible from the Internet. Cloud servers are in a Virtual Private Cloud (VPC). On-premises servers are servers in on-premises data centers that connect to a VPC through Direct Connect or Virtual Private Network (VPN). NAT Gateway supports up to 20 Gbit/s of bandwidth.
NAT Gateway supports source NAT (SNAT) and destination NAT (DNAT).
- SNAT translates private IP addresses into EIPs, allowing servers in a VPC to share an EIP to access the Internet in a secure and efficient way.
- DNAT enables servers in a VPC to share an EIP to provide services accessible from the Internet through IP address mapping or port mapping.
Parent topic: Overview