On Sep 21, "Jeremy Webb" wrote:

> I've recently gotten flow-tools and flowscan up and running here on our 
> network.  It's been a great help to us to see what kind of things are going 
> on out there on our network.  One of the things we've noticed out there is 
> that a LARGE chunk (35% as of today) of our outbound traffic is being eaten 
> up by a particular service (bittorrent), and this number has slowly been 
> growing.
> 
> I'm new to the flow-tools and flowscan world, so I'm not too savvy yet on 
> how to make it do what I'd like it to do.  Where can I find some 
> information on how to determine my top users for a particular service?  I 
> have a list of my top overall users, but I'd like to know who is hogging 
> all of our outbound bandwidth.  Any help would be greatly appreciated.

Passing flows through flow-filter as such would give you your answer for
bit-torrent:

flow-cat blahblah | flow-filter -P 6881,6882,6883 | flow-stat -f11 -S2

flow-nfilter allows for more powerful expressions.
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