DNS Failover with Route53 DNS Failover with Route53 Route 53‘s DNS Failover feature gives you the power to monitor your website and automatically route your visitors to a backup site if it… DNS Failover with Route53 Route 53 ‘s DNS Failover feature gives you the power to monitor your website and automatically route your visitors to a backup site if the main target is not healthy. To showcase this feature, we are going to deploy an application, which we built in this blog post , to two different AWS regions. We are also going to set active-passive failover in Route53, then we will remove the application from one region and we’ll observe how DNS queries will react to the changes. AWS describes the failover scenarios in 3 different categories Active-passive : Route 53 actively returns a primary resource. In case of failure, Route 53 returns the backup resource. Configured using a failover policy. Active-active : Route 53 actively returns more than one resource. In case of failure...