hacking attempts

[Littlefield, tyler]

Hello list,
I just had someone bomb the hell out of my system on a udp port, moving from ip of 22 to 249.
My logwatch was huge.
Is there a way I can block things like this?
I'm not sure how to set up iptables, and don't really have a whole lot of time to go through a huge 300000 page tutorial.
Thanks,
Tyler Littlefield
Unlimited horizons head coder.
check out our website:
tysplace.homelinux.net
msn: compgeek134 at hotmail.com
aim: st8amnd2005
skype: st8amnd127