Try to create role SYSDBA in your database, then You prevent SYSDBA to connect to database.

Tom

--- In firebird-support@yahoogroups.com, "trskopo" <trskopo@...> wrote:
>
> Dear Thomas Steinmaurer,
>
> Thanks for your reply.
>
> I don't give SysDba password to users, but since Firebird is freely available, it is easy for users to install Firebird in his/her computer and copy my database to this computer and then disable triggers in my database using his/her new SysDba password.
>
> Best regards,
> Sugiarto