[LARTC] Bandwidth Shaping

[bbeverage@intelliwave.com]

I own a WIreless ISP and have recently began suppling bandwidth to college 
dorms.  As I expected, 90% of the bandwidth they consume is downloading music 
with programs such as Kazaa.  I would like to throttle this bandwidth, only as 
needed.  As long as extra, unused bandwidth was present, the music folks 
should be able to use it, but when a web or email user needed more bandwidth, 
the music user should be throttled and the web user should access the Internet 
at full speed.  

I don't want to eliminate the music users ability to download music, I just 
would like them to receive the "left over" bandwidth and not the "Lion's 
share."

Is there a way to accomplish this with Linux?

I have reviewed several applications and appliances that claim to do this very 
thing.  I would however like to find a cost effective Linux solution as 
opposed to a $5000 packateer solution.

I beleive the only way to accomplish this is to look at the application layer 
of the communication.  Limiting via port is not sufficent as Kazaa and many 
other programs can be configured to operate on port 80.

Any and ALL help would be MUCH appreciated.

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