These scripts, in conjunction with hping2, can be used to monitor the 
traffic usage of any host which increments its IP ID for each packet
it sends. 

You can find the latest version of hping at the following website:
 - http://www.hping.org/

For example:

# hping -PA -p 80 -c 60 www.defcon.net > defcon.net.log 2>&1
# ruby graph_hping_log.rb defcon.net.log defcon.net.png