The Oracle database agent was unable to collect data and connect to database server, when user activated "Inbound connections that do not match a rule are blocked" under "Windows Firewall with Advanced Security", with the below exceptions.
ECHO <fb8be857-fbcf-4747-973d-295a8570e581/DB_Oracle/5.7.5.7/DB_Oracle/OracleXXXX-agent> ERROR [ConnectionManagementThread-[OraclePool-OracleXXXX-XXX]
[OracleProfile{host='XXXXX', instance='XXX', username='XXXXX', asSysDBA=false, ports='1521', properties={oracle.jdbc.ReadTimeout=900000}}]] com.quest.qsi.fason.framework.connections.jdbc.JDBCConnectionImpl - Failed to create new connection. [OracleProfile{host='XXXXX', instance='XXX', username='XXXXX', asSysDBA=false, ports='1521', properties={oracle.jdbc.ReadTimeout=900000}}]
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
But the agents could successfully collect data when the above option was disabled.