>
> Just set the RemoteBindAddress setting in firebird.conf and restart the
> server. This will bind Firebird to the network interface specific to that
> address. NB: I am not sure if this would work for classic, you might need
> to change the xinetd config to achieve the same effect.
>

It doesn't. For classic you need to add "bind" to xinetd.conf:
service gds_db
{
disable = no
bind = 127.0.0.1
...
}

cheers,
Michael