Connection refused

If "Connection refused" is logged in

/usr/ngasi/logs/catalina.out,

it suggests the Root System in which NGASI AppServer Manager is installed

does not have access to the Plesk Database installed in a VPS.

In the VPS, add the following to the my.cnf MySQL configuration file:

bind-address            = 0.0.0.0

Then restart the MySQL server.

Make sure NGASI AppServer Manager is restarted.