Reltio AuthNG multi-region routing flow uses NS1 external DNS and AWS Route 53 latency-based routing to direct authentication traffic across US (us-east-1) and EU (eu-west-1) regions. Each region deploys Kong API Gateway in public subnets, routing requests to AuthNG primary and standby instances in private subnets, with RDS databases synchronized across regions. Health checks via Kong trigger CloudWatch alarms, while WAF, IAM, and CloudTrail provide security and compliance monitoring. This architecture demonstrates active-active regional failover with sub-millisecond latency optimization and automated health-driven traffic steering. Fork this diagram to customize VPC CIDR blocks, instance types, or add additional regions for your Reltio deployment.