Difficulty connecting MySQL database: host *.compute.amazonaws.com not allowed

[bradlymathews]

Are you doing the entire IP address range specified by the subnet mask? I know this bit me before I realized my mistake:

Getting "whitelisting Retool's IP Address" Error [IPs are added]

Ah, got it! In that case, have you whitelisted the new self-hosted IPs? https://docs.retool.com/docs/network-storage-requirements