It is AWS best practice to remove entries in Security Groups which allows MongoDB access from public IP to reduce possibility of breach. Allowing unrestricted MongoDB access can increase threats like hacking, denial-of-service (DoS) attacks and loss of data.
Send report of VPC which does not have managed NAT gateways. the Managed NAT Gateway service is using optimized software to handle NAT traffic and is fully managed by AWS compared to the NAT instance which is not optimized and requires scaling and regular maintenance such as installing software updates or patches.
This workflow enables the MultiAZ for RDS DB instances and then after a delay of 1 hour it forces it to fail over. Again after 1 hour of delay it disables the MultiAZ feature for the RDS DB instances and then sends a report
Enabling the Multi-AZ Automatic Failover feature for your Redis Cache clusters will improve the fault tolerance in case the read/write primary node becomes unreachable due to loss of network connectivity, loss of availability in the primary’s AZ, etc. This template this feature for your ElastiCache cluster.