When using the Nectar Database service, it is advisable to limit access to your database instance for security purposes.
Therefore, we recommended that when you create a database instance, you provide the CIDRs (or IP address ranges) in the Allowed Hosts field when launching from the dashboard or the --allowed-cidr option when launching from the command line.
Unfortunately this value can only be provided at launch time, and cannot be applied to a running database instance or modified once the database instance has been created, so you will need to launch a new instance if you find yourself in this situation.
Alternatively, you can use Advanced Networking to launch you database in a private network if you do not require access outside of the Nectar Research Cloud.
Please note that you may require Advanced Networking quotas if you wish to use a private network.