Re: [SLUG] traffic monitoring question

From: Robert Foxworth (rfoxwor1@tampabay.rr.com)
Date: Thu Jul 15 2004 - 19:49:53 EDT


> > I'm looking for software that will monitor all the
> > traffic on my network and create a nice viewable graph
> > which I can view from anywhere with a web browser.
>
> mrtg might fit that bill... haven't used it for sometime
> though. http://mrtg.hdl.com/mrtg.html

It's not clear to me if you want to just look at the density
of traffic at layer 2, or want to sort by protocols.

mrtg would work but needs to go through a device that
has SNMP enabled, so you can poll the MIB of the
interface and see what the stats are.

You can buy a Cisco 2501-type on eBay and turn on SNMP server
and look at that with mrtg but that seems complicated
to just send traffic through it, as you probably would
want two ethernet interfaces, and an up to date IOS image
of 12.x, or two routers back to back through the serials.

There is a commercial program "observer" that runs on a
windows box that graphs traffic density by pkts/sec and by
utilization percentage and draws a quite detailed graph
of each parameter but it doesn't cache the data very long,
maybe 20 minutes. You could vnc to the box and see the
screen detail remotely. Observer costs nearly $1k for one
instance, and I doubt it is the real answer to your requirements.

You could run the ipcop firewall which includes mrtg and
send all your traffic through it, which has a web interface
but again not a true solution I suppose.

A lot of non-answers, I guess.

Bob

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