Traffic Monitor

[Lewis Watson]

> I am an ISP running FreeBSD as a firewall and as a Mail Server. My
> problem is that I am not able to monitor the amount of traffic that user
> are using on my network.

> What I am looking for is some app that could show me live what ip on my
> network is utilizing what part of the bandwidth.I know there are a
> million apps available but I need to see from IP ???? to IP ???? ????
> kb/s and then see how much of the 256k is still available. Don't laugh
> !!I have a 256k Diginet connection and I would like to see who is
> killing my network. I do get live graphs from my upstream supplier but
> it shows the line utilization from my router and not who is using
> what.So I can't be proactive in solving speed issues I need to wait for
> it to happen and then by a process of elimination disconnect segments of
> the network and see when the graph drops.
> 
> Spidey
> 


Hi Spidey,
There are a few programs that come to mind. You mention to see data in real time. For this trafshow is nice to have. For more information and a heavier load  you could look at ntop. It provides a great deal of information. There is also the ability to log IPFW which could also be used to provide you with some detail. Another possibility is bandwidthd.

As mentioned trafshow does show the traffic in real time and is light-weight and very easy to use.  I

Ntop runs it's on web server and provides a much greater depth of detail than what you have mentioned here.

Bandwidthd provides graphs (similar to MRTG but monitors each ip address on the router individually!!) for the hosts it is configured to monitor. 
HTH,
Lewis Watson