What Are the Differences Between Private NAT Gateways and Public NAT Gateways?

Private NAT gateways perform NAT between private IP addresses and resolve the following problems:

• Private IP address conflicts
• Access from specified addresses

Public NAT gateways perform NAT between private IP addresses and public IP addresses and have the following advantages:

• Secure: Only shared EIPs, instead of all EIPs of servers, are exposed to the Internet.
• Cost-effective: EIPs and bandwidth are shared, saving network infrastructure costs.