Hi Erley,

> I'd like to know how developers can protect Firebird's database
> against not authorized users connecting databases from distributed
> systems.
> (...)
> I'm talk about an application that will be installed on client's
> machines so users will have access to my firebird file (.fdb)

Please consult this excellent article (in HTML or PDF):

http://www.firebirdsql.org/manual/fbmetasecur.html
http://www.firebirdsql.org/pdfmanual/Firebird-Security.pdf


Kind regards,
Paul Vinkenoog