Can I Access an RDS DB Instance over an Intranet Across Regions?

By default, RDS DB instances cannot be accessed over an intranet across regions. Cloud services in different regions cannot communicate with each other over an intranet. You can use EIP, Cloud Connect, or Virtual Private Network (VPN) to connect to RDS instances across regions.

• EIP: If an RDS instance cannot be accessed using a floating IP address, you can access it over the public network using an EIP.
  • For RDS for MySQL instances, see Using MySQL CLI to Connect to an Instance Through a Public Network.
• Cloud Connect: It allows VPCs across different regions to communicate with each other, regardless of whether they belong to the same account or different accounts, enabling cross-region connectivity to build a global cloud network. For details, see Using a Cloud Connection to Connect VPCs in the Same Account But Different Regions.
• VPN: It uses an encrypted tunnel to connect VPCs in different regions and sends traffic over the Internet. It is inexpensive, easy to configure, and easy to use. However, the quality of VPN connections depends on the quality of your Internet connection. For details, see Connecting an On-Premises Data Center to a VPC Through a VPN.