Dear Guilherme.
Unfortunately, after spending the whole sunday around this ... I can tell you that I could not to get any successful connection from any Oracle database.. I tried several different instances. Because you said my problem could be localhost installation or notation then after frustrated local test I created a Amazon RDS instance with public endpoint and oeven so I really got nothing good....
Amazon RDS is available in the web... so much that I got a good connection from my PL/SQL Developer on my notebook.. all works good... but on the other hands, from Outssystems Platform no success!. The message now is "Connection String test failed: Connection request timed out"
Below are data about my amazon Rds service for testing:
Endpoint (server): dd-aws-rds.ctc4eqwnxe9r.us-east-1.rds.amazonaws.com
Port: 1521
Service Name: orcl
User: OUTSYSTEMS
Password: outsystems
Please help on this otherwise I will stop to learning Outsystems.. cause for me just database use makes sense.
regards.
DARCIO DOMINGUES