Overview

A NAT gateway enables multiple instances within a virtual private cloud (VPC) to communicate with the Internet or private networks. Custom SNAT and DNAT rules can be created to help you use network resources in a flexible manner.

Benefits

NAT Gateway offers high performance, automatic elasticity, and flexible billing options with extensive O&M features.

• High Performance A NAT gateway supports tens of Gbit/s of throughput and millions of connections. This meets the requirements of large-scale workloads migrated to the cloud.
• High Reliability Provides reliable gateway services that support disaster recovery across data centers with automatic elasticity as the business fluctuates
• Cost-Effectiveness Supports bandwidth sharing among multiple VPCs and ECS instances to reduce bandwidth costs significantly
• Easy O&M The graphic console makes it easy to create custom NAT rules and provides more than 22 monitoring metrics to facilitate operations and maintenance.

Features

Public Address Translation

Flexible SNAT and DNAT management allows you to easily provide Internet access and services for instances in a VPC. SNAT SNAT allows multiple ECS instances in a VPC to use the same EIP to access the Internet. This prevents security risks caused by direct exposure of ECS instances to the Internet. DNAT DNAT allows you to open specified ports on instances in a VPC to the Internet. Multiple instances can use the same EIP to provide Internet-facing services. Multiple EIPs You can associate multiple EIPs with a single NAT gateway to easily implement horizontal scale-out of EIPs.

Private Address Translation

Flexible SNAT and DNAT management allows you to implement access between private networks with specified IP addresses. This effectively resolves the IP address conflicts between private networks and implements secure isolation. SNAT SNAT allows multiple ECS instances in a VPC to use the same private IP address to access private networks. This hides the actual IP addresses of the ECS instances, prevents IP address conflicts, and reduces the risk of direct server attacks. DNAT DNAT allows you to open specified ports on instances in a VPC to a connected network. Instances can use the specified private IP address to provide services. Custom Address Translation You can flexibly manage the private IP addresses for mutual access to meet the business requirements for mutual access with specified IP addresses.

High Performance and Elasticity

Auto Scaling Pay-by-CU instances support auto scaling to a throughput of 15 Gbit/s at most based on your usage. Superb Performance Dedicated NAT gateways support a throughput capacity of 100 Gbit/s and tens of millions of concurrent connections. This effectively meets Internet access requirements of a large number of instances.

Visual Management

Multi-dimensional Metrics Traffic metrics in multiple dimensions are displayed in a visual manner. You can set alert rules based on each metric to detect and resolve issues at the earliest opportunity. Top ECS Instances You can monitor and display the traffic of ECS instances. This allows you to analyze business usage and accurately find ECS instances with abnormal business traffic.