Thank you for posting.

> Make sure than yo use  TCP/IP connection string (localhost:/whatever)

I'm using this command:

./isql -user sysdba -pass masterkey localhost:/data/med6/fdb/mydatabase.fdb

and get the "Permission denied"

but if I move the mydatabase.fdb file to /var/lib/firebird/data/mydatabase.fdb I can acces normally to the database.

Hernando.