Error connecting to remote graph

Hi, I'm trying to establish connection with a remote graph, my configuration is:

fabric.database.name=ddb

fabric.graph.0.uri=neo4j://IP1:7687
fabric.graph.0.database=dbo1
fabric.graph.0.name=dbo1

fabric.graph.1.uri=neo4j://IP2:7687
fabric.graph.1.database=dbo2
fabric.graph.1.name=dbo2

and uncommented the line:
dbms.default_listen_address=0.0.0.0

but when i try to query any of the two nodes I receive the following error messege:

Neo.ClientError.Security.Unauthorized
The client is unauthorized due to authentication failure.

How can I successfully connect to the other nodes?

Hi @RamiroVal have you checked if the firewall for the ports 7687 is opened in your server? If yes, did you check if you have the right credentials?