Flush Hosts (RDS)

flush-hists

Flush Hosts on RDS instances when you cannot directly connect.


Reset the master password on the instance
SSH into an EC2 instance which can connect to the instance
install the mysql client (Amazon AMIs) sudo yum install mysql

connect to the db as roort:
mysql -h <<RDS HOST>> -u root -p

Once connected execute: 

FLUSH HOSTS;