I am struggling with this - i've read loads about it but I still cannot see where I am going wrong.
I've installed MySQLWorkBench and connection tests to my RDS fail. I've tested using telnet to my endpoints on port 3306 and they cannot connect either.
I've created the classic public/private subnets within the Amazon VPC, this includes a DBServerSG Security Group which is currently set to Allow ALL inbound traffic and allow ALL outbound traffic (for testing) and i've ensure my RDS instance is set with the right DB Subnet Group.
I don't have a firewall on my client PC either
I STILL can't connect to my RDS Instances, any thoughts?
Edit, I created a second instance to rule out password/user problems