Huawei Cloud NAT Gateway

A public NAT gateway allows cloud servers in a VPC to share EIPs for Internet access, to keep costs down while also improving security by hiding servers behind EIPs. A private NAT gateway translates IP addresses between a VPC and on-premises data center or another VPC, allowing the user to keep legacy networks unchanged after migrating some of workloads to the cloud.

Huawei describes the product advantage as:

- An extra-large NAT gateway can handle millions of concurrent connections to a single destination address and port.

- Instances in different AZs can share the same public NAT gateway for Internet access or the same private NAT gateway for communication with an on-premises data center or a remote VPC.

- Multiple instances can share the same EIP and the associated bandwidth resources for Internet access.

- Private NAT gateways allow communication between your on-premises data center and your VPC without the need to change existing networks or IP addresses.