This topic provides an overview of NAT Gateways. A NAT Gateway is an enterprise-class VPC Internet gateway that provides NAT proxy services (SNAT and DNAT), up to 10 Gbps forwarding capacity and cross-zone disaster tolerance.
- SNAT allows an Elastic Compute Service (ECS) instance without a public IP address to access the Internet.
- DNAT maps a public IP address of a NAT Gateway to an ECS instance so that the ECS instance can be accessible from the Internet.
Reduce the Internet costs of a NAT Gateway
- Internet Shared Bandwidth provides region-level bandwidth sharing. You can add an EIP associated with a NAT Gateway to an Internet Shared Bandwidth instance so that the EIP can use the bandwidth of the Internet Shared Bandwidth. For more information, see Add EIPs to an Internet Shared Bandwidth instance.
- A Data Transfer Plan is an affordable traffic package which takes effect immediately upon purchase. The traffic fees generated by ECS instances, EIPs, Server Load Balancers (SLBs) and Internet Shared Bandwidth instances are automatically deducted from the Data Transfer Plan. For more information, see Purchase a Data Transfer Plan.