I have hosted an AWS RDS inside the private subnet of the VPC. While creating the VPC with public and private subnets, I had to create a NAT instance. I know NAT instance is mainly for private instances to connect to the internet.
Is the NAT instance necessary for RDS also? Are the RDS' maintenance and update also goes through the NAT instance? I only have the RDS in private subnet, all other EC2 instances are in public subnets. If RDS is not using the NAT instance, I can go ahead and stop the instance, right?
Any help will be appreciated.