I have two RDS instances, both hosted in the same VPC, and on the same subnet. Both have the same security group applied. Both are the same size, encryption disabled, basically exactly the same other than the instance name and table name.
However, I can only connect to one of them (an older one). The one I've created (and recreated) today gives me
116 "Connection timed out" -- I can't even telnet to the endpoint:port. Are there factors outside of the RDS dashboard that I should look into? I've even tried adding
Allow ALL from ::/0 to the security group, with no luck.