After the linux (DEB or RPM) driver is installed, a DSN with the name DEVART_FIREBIRD is created. You can use it to test the connection with the FIREBIRD server. For this, perform the following steps:
User ID=<your Firebird User Name>
Password=<your Firebird password>
Server=<your Firebird server address>
Port=<your Firebird Port>
Database=<your Firebird database name>
Client Library=<path to the used Firebird client library>
isql -v DEVART_FIREBIRD