Describes the cause and action for error messages.
Error Message(English)：
ec2 cannot connect to rds
amazon rds - EC2 cannot connect to RDS on VPC. Subnet issues ...
https://serverfault.com/questions/619960/ec2-cannot-connect-to-rds-on-vpc-subnet-issues
amazon ec2 - Cannot connect to RDS from ...
https://serverfault.com/questions/845199/cannot-connect-to-rds-from-elasticbeanstalk-connection-time・・・
amazon ec2 - Can't connect to RDS MySQL
https://serverfault.com/questions/661783/cant-connect-to-rds-mysql
Access Amazon EC2 RDS instance from inside VPC
https://serverfault.com/questions/597957/access-amazon-ec2-rds-instance-from-inside-vpc
amazon ec2 - PHP cannot connect to AWS RDS ...
https://serverfault.com/questions/519268/php-cannot-connect-to-aws-rds-server
amazon ec2 - Cannot connect to RDS from Elasticbeanstalk ...
https://serverfault.com/questions/845199/cannot-connect-to-rds-from-elasticbeanstalk-connection-time・・・
Recently Active 'amazon-rds' Questions - Page 4 - Server Fault
http://serverfault.com/questions/tagged/amazon-rds?page=4&sort=active
Highest Voted 'amazon-rds' Questions - Page 2 - Server Fault
https://serverfault.com/questions/tagged/amazon-rds?page=2&sort=votes
Highest Voted 'amazon-vpc' Questions - Page 2 - Server Fault
http://serverfault.com/questions/tagged/amazon-vpc?page=2&sort=votes