Hello, I am working on an application in B4A. This application consumes information from PostgreSQL DB hosted on a remote Ubuntu server. Use Tomcat I use the jRDC connection but, when I try to test the connection to the server, I do not know how to properly configure the java server port (config.properties). I have replicated the database on localhost, tested the jRDC connection and it works fine. I think the problem is with the java port server. By default, it is set to 17178. What does this value depend on? What value does it take on a server? The ports enabled on the server are: 53102 for DB PostgreSQL 53103 for webApp Django 53106 for TomCat Can someone help me better understand this? Thank you