Problem with Firewall

[TongKe Xue]

Hi all,

I'm using the iptables config from:
http://www.netfilter.org/documentation/HOWTO//packet-filtering-HOWTO-5.html

Now, when I try that, apparently KDE and GNOME both refuses to start
-- do they run some kind of server and then connect to it? How can I
fix this?

(Worked fine on RH9; but apparently refuses to work on FC2).

Thanks,
--TongKe