I do not know what the service name of the firewall demon is in fc 17. Trying to add a printer results in:
FirewallD is not running. Network printer detection needs services
mdns
ipp
ipp-client
samba-client
Now, these services can be easily turned ON with:
sudo system-config-firewall
But, how does one start the firewall demon?

Floyd,
sgallagh says use:
service firewalld start
This does not work - result is:
[root@localhost ~]# service firewalld start
Redirecting to /bin/systemctl start firewalld.service
Failed to issue method call: Unit firewalld.service failed to load: No such file or directory. See system logs and 'systemctl status firewalld.service' for details.
This is because systemctl -a shows there is NO service called firewall (or ANYTHING similar) in fc 17.
This why I am asking what its name in fc 17 is. It probally is loaded by default. But what is its name. Probablly the printer config also thinks its name is firewalld which I can log a bug against it if that is the case.

I'm still familiarizing myself with F16 and I don't know what changes F17 brought wrt services but running 'systemctl -a' and grepping for "firewall" should show. For earlier incarnations of Fedora, I mean the ones without amputated /etc/init.d, the "firewall service" would be at /etc/rc.d/init.d/ip(6)tables.