Here we've made a checklist to be followed in case a connection attempt fails:
- Check whether the database name and the username are accurate. You may be requesting a service on one system while the database you require is on another system. Recheck your credentials. Especially ensure that you haven't mixed things up, 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 ...
