1. What Is NATGW?
When the private and public networks are isolated, NATGW translates the private IP addresses and public IP addresses in the VPC to enable the private network to access the Internet. NATGW supports a maximum burst traffic of 5 Gbps and 10 million concurrent connections. At the same time, as a high-availability gateway, NATGW achieves dual-host hot standby and automatic switch when a single machine fails without business perception. NATGW is a gateway that translates private IP addresses and public IP addresses in the VPC. It is a way for cloud resources without public IP addresses in VPCs to access the Internet (but it does not support active Internet access to VPCs).
2. What Is the Difference Between NATGW and Public Network Gateway?
NATGW and public network gateway are both used for CVMs in VPCs to access the Internet, but there are some differences between them.
3. What Are the Configuration Types of NATGW?
NATGW supports binding 10 EIPs and provides three configuration types: small (maximum 1 million connections), medium (maximum 3 million connections), and large (maximum 10 million connections).
4. What Are the Key Features of NATGW?
The main features of NATGW include SNAT, DNAT, high performance, high availability, monitoring details display, and gateway refined flow control.
5. What Are the Constraints of Using NATGW?
NATGW has its usage constraints. For example, deleting a NATGW will disassociate its EIP, but will not release the EIP from the user account.
6. What Is the Network Topology of NATGW?
When resources such as CVMs in the VPC send data packets through NATGW, the data first passes through the router and is routed according to the routing policy.
7. What Is the Main Feature of NATGW?
It supports SNAT and DNAT.
8. What Is an EIP?
An EIP address is a static IP address designed specifically for dynamic cloud computing. It is a fixed public IP address in a certain region. With EIPs, users can quickly map an address to another NATGW in their account to isolate instance failures.
9. What Is a Region?
Regions in the cloud platform are completely isolated from each other, ensuring maximum stability and fault tolerance between different regions. We will gradually increase the supply of regions to cover more nodes. It is recommended that users select the region closest to their customers to reduce access latency and improve download speed.
10. How to Select a Region Suitable for Users?
The region selection follows the following principles:
- Principle of proximity to users
- Select the CVM region based on users' geographical location. The closer the CVM is to the accessing clients, the lower the access latency and the higher the access speed will be.
- Principle of intra-region private network communication
The private network is interconnected within the same region and is isolated across different regions. Users requiring private network communication between multiple CVMs should select the same CVM region. CVMs within the same region can communicate through the private network. CVMs across different regions should communicate through the public network instead of the private network.
11. What Is the Degree of Isolation Between AZs?
Each AZ operates on its own independent, physically distinct infrastructure and is designed to be highly reliable. Common points of failure, like generators and cooling equipment, are not shared between AZs. Additionally, they are physically independent of each other, so even extremely rare disasters such as fires, tornadoes, or floods would only affect a single AZ.
12. How Many NATGWs Can Be Created?
Different resources have different creation quantity limits.