To configure your firewall for access to your Neo4j Aura database you should whitelist the relevant Aura public IP addresses based on your region(s):
|Geographic region||Name||IPv4 Address||Ports|
Further details of physical location can be found here
Note: To connect to Aura in your application, your URI will need to use the fully qualified domain name (FQDN) of your database, and not just the IP address.
For example, if your database ID is abcd1234, then the URI to use would be neo4j+s://abcd1234.databases.neo4j.io.