If you are a multi-tenant Cloud customer then you have an IBM Informix IDS database running under CentOS Linux. No customers have direct access to CentOS, they can only log into the Fitrix application and run it but they cannot access any other area of CentOS. Your database(s) are configured at the database level to deny access to all users other than the users you have configured under Fitrix Account Management. The Informix database will enforce this access.