PostgreSql sudenly blocking local connections

Hi there,

This sounds like it could be related to security groups, firewall, or a proxy if you're behind one. Try using at least a /24 when setting inbound rules to your RDS instance. The IP address of RDS instances is also dynamic, meaning it changes, so this could have implications if you're behind a firewall or proxy.

These guides are great for troubleshooting common issues and setup though so read through these to see if the answer is in there:

• https://repost.aws/knowledge-center/rds-cannot-connect
• https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ConnectToPostgreSQLInstance.html
• https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Troubleshooting.html#CHAP_Troubleshooting.Connecting

I hope that helps :)