AWS RDS Postgres connection failure

I am getting started on AWS RDS. I am trying to create a public PostgreSQL instance (free tier) and trying to connect from my local laptop through SQL Workbench. I am following the instructions from this https://aws.amazon.com/getting-started/tutorials/create-connect-postgresql-db/

But, when I try to connect from SQL Workbench, I get "connection attempt failed" error. I have verified the steps, host name, port, dbname to make sure I am not missing any. I am still unable connect from SQL Workbench.

Do I have to take care of any other configurations? Is there a way to debug if the rds db instance is reachable (ping/telnet)? Appreciate any help with this. Thank you!

Solution

You should check the following on the Amazon RDS instance:

It is set to publicly accessible
It is in a public subnet
It has a security group configured to permit inbound access from your IP address on port 3306
Your local network is not blocking the connection (try it from home, or tethered via your phone)