NAT Gateway is an Alibaba Cloud service that provides address translation. You can use NAT Gateway to hide cloud service addresses to improve your network security.
Service type
Alibaba Cloud provides Internet NAT gateways and Virtual Private Cloud (VPC) gateways. You can choose a type based on your business requirements.
Internet NAT gateway: converts and hides cloud service addresses to prevent address exposure. This improves network security. Internet NAT gateways also support automatic scaling, high performance, high availability, and flexible billing. You can use Internet NAT gateways to manage Internet traffic. For more information, see What is an Internet NAT gateway?
VPC NAT gateway: converts cloud service addresses to allow communication among conflicted addresses and specified addresses. For more information, see What is a VPC NAT gateway?
Benefits
Security
The SNAT feature of NAT Gateway can prevent address exposure. You can configure SNAT entries to manage inbound and outbound access.
High elasticity and high performance
NAT Gateway supports automatic scaling and high performance to meet requirements in scenarios such as traffic spikes.
High availability and stability
NAT Gateway supports cross-zone disaster recovery. This ensures that services can run as expected if one zone fails.
Flexible billing
NAT Gateway supports the pay-as-you-go billing method to reduce costs for Internet access.
Monitoring
Internet NAT Gateway supports multiple monitoring metrics in various dimensions, and supports session logs and VPC flow logs to meet different monitoring requirements.