bandwidthd tracks usage of TCP/IP network subnets and builds HTML files with 
graphs to display network utilization. Charts are built by individual IP. It 
color codes HTTP, TCP,UDP, ICMP, VPN, and P2P traffic. Unlike MRTG, it tracks 
each individual IP address, not the status of any particular link. 

WWW: http://bandwidthd.sourceforge.net/