[rhn-users] NTP

[Nick Baronian]

If I want to use NTP to sync to a time server does my machine have to
open port 123 UDP.  I don't want to be a NTP server, I just want to be
the client that polls a server.  I know I can use iptables to do
something like
$IPTABLES -A INPUT -j ACCEPT -p tcp -s 66.187.224.4 --dport 123
But I would like to completely close the port if possible.
Can this be done?

Thanks,
Nick