Introduction to UNAT

NAT Gateway is an enterprise-level VPC public network gateway, which allows cloud resources in the subnet that are not bound to elastic IPs to access the external network, and can also configure port forwarding rules to enable cloud resources to provide services to the outside world.

Mode Setting

The NAT gateway can be set to normal mode or whitelist mode. In normal mode, all cloud resources in the specified subnet of the NAT gateway that are not bound to an Elastic IP can access the Internet through this NAT gateway. In whitelist mode, only the cloud resources defined in the whitelist and in the specified subnet of the NAT gateway can access the Internet through this NAT gateway. Before switching the NAT gateway to whitelist mode, you can configure the whitelist in advance to ensure that the switch to whitelist mode does not affect normal operations. In normal mode, the whitelist can be configured, but it does not take effect.

Port Forwarding

Users can configure port forwarding, mapping the intranet ports of cloud resources within the VPC to the NAT gateway, enabling cloud resources to provide services externally. Cloud resources in the specified subnet that have bound elastic IPs will not appear in the optional list for port forwarding configuration.

Internet Exit

Supports setting a specific cloud resource in the subnet to access the internet through a designated EIP. Provides default exit rules, supporting resources within the subnet to access the internet through load balancing or a designated EIP.

Quota Limit