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Can I Change the VPC or Subnet that My RDS for PostgreSQL Instance Belongs To? No, you cannot directly change the VPC or subnet on the RDS console. However, you can change the VPC or subnet by restoring a full backup to a new DB instance. For operation details, see Restoring a DB
Figure 2 Flowchart Method 2: Using VPN to Connect VPCs in Different Regions You can use Virtual Private Network (VPN) to enable communication between VPCs across regions. Ensure that the primary and DR instances are in the regions where VPN is available.
VPN 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.
You can use Cloud Connect or Virtual Private Network (VPN) to connect the VPCs in different regions. Before using this function, ensure that the primary instance and DR instance are available and are deployed in different regions.
You can also use Direct Connect or VPN to encrypt data transmission. Parent Topic: Network Security
Ensure that the primary DB instance and DR instance are in the regions where Cloud Connect or Virtual Private Network (VPN) has been rolled out. DR instances do not support point-in-time recovery (PITR) or CBR snapshot-based backups.
If a VPN connection is used, check whether the VPCs are connected as instructed in Method 2: Using VPN to Connect VPCs in Different Regions.
