A company's processing team has an AWS account with a production application. The application runs on Amazon EC2 instances behind a Network Load
Balancer (NLB). The EC2 instances are hosted in private subnets in a VPC in the eu-west-1 Region. The VPC was assigned the CIDR block of 10.0.0.0/16. The billing team recently created a new AWS account and deployed an application on EC2 instances that are hosted in private subnets in a VPC in the eu-central-1
Region. The new VPC is assigned the CIDR block of 10.0.0.0/16.
The processing application needs to securely communicate with the billing application over a proprietary TCP port.
What should a solutions architect do to meet this requirement with the LEAST amount of operational effort?
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