Here we've made a checklist to be followed if a connection attempt fails:
- Check whether the database name and the username are accurate. You may be requesting a service on one system when the database you require is on another system. Recheck your credentials; ensure that you haven't mixed things up and that you are not using the database name as the username, or vice versa. If you receive too many connections, then you may need to disconnect another session before you can connect, or wait for the administrator to re-enable the connections.
- Check for explicit rejections. If you receive the pg_hba.conf rejects connection for host... error message, it means your connection attempt has been explicitly rejected by the database ...
