I know there's a bug come with RedHat 7.2. That is firewall settings
in "SETUP" command. When I change the firewall level to "no firewall"
or "custmize", everything seems to be very good. But if I run "SETUP"
to see the firewall settings again, it will return to "HIGH LEVEL".
My question is: When I run setup to change the firewall settings,
which file am I modifying? I wanna modify the file directly without
running this "SETUP" any more.