Bandwidth Question

[Chris]

Hello,


I was wondering what is the best way to limit bandwidth to a set of IP 
addresses?  I've read some about dummynet.  Would this be the preffered 
tool to use?  Also, if someone could recommend a program to log how much 
bandwidth a particular IP uses per month etc..., and also display graphs 
about bandwidth usage I would appreciate it.

Thank You
-Chris