NAT Gateway has multiple features including SNAT (Source Network Address Translation), DNAT (Destination Network Address Translation), traffic alarm, Bandwidth Package, automatic disaster recovery, etc.
SNAT
SNAT supports multiple CVMs under the same VPC to access the internet through the same public IP. The NAT Gateway can support a single-instance forwarding capacity of 5 Gbps.
DNAT
DNAT maps the private IP address, protocol, and port of CVMs within the VPC to the public IP address, protocol, and port, enabling services on CVMs to be accessed from the public network.
Traffic Alarms
You can set custom traffic alarms for VPN connections. When the metric value exceeds a certain threshold, an alarm is automatically triggered. The alarm message is sent via email and SMS to help you get an early warning of risks. Monitoring and alarm services are free of charge and can help you quickly locate problems when they occur.
Automatic Disaster Recovery
NAT Gateway supports hot standby and automatic disaster recovery. It can automatically switch when a stand-alone fails without any business awareness. The service availability is as high as 99.99%, ensuring the stable operation of your business.