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Date:      Wed, 6 Dec 2006 11:53:25 -0600
From:      Josh Paetzel <josh@tcbug.org>
To:        Julian Elischer <julian@elischer.org>
Cc:        freebsd-net@freebsd.org, Benjamin Adams <freebsdworld@gmail.com>, Brett Glass <brett@lariat.net>
Subject:   Re: Bandwidth Monitoring program
Message-ID:  <200612061153.26040.josh@tcbug.org>
In-Reply-To: <4576EB9D.2040300@elischer.org>
References:  <6199c3dc0612050848g16a0911dga145485ba14bf21f@mail.gmail.com> <200612060313.23621.josh@tcbug.org> <4576EB9D.2040300@elischer.org>

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On Wednesday 06 December 2006 10:11, Julian Elischer wrote:
> Josh Paetzel wrote:
> > On Tuesday 05 December 2006 23:52, Brett Glass wrote:
> >> Add a few IPFW "count" rules to count the bytes and packets.
> >> Then, periodically harvest and reset the counters via a cron job
> >> and write the results to a file. You can then prepare tables and
> >> charts which are as simple or as fancy as you please, without
> >> resorting to SNMP (which isn't secure). A little bit of code in
> >> your favorite scripting language will do it. And of course you
> >> can output to a graphing package, though for me a simple
> >> histogram using asterisks has sufficient precision in most
> >> cases.
> >>
> >> --Brett Glass
> >
> > Just curious.....but where is he going to run ipfw?  I seriously
> > doubt his router can run it, and what good is it going to do him
> > to run it on a machine on the network if the network is switched?
> >  It's not going to be able to see any of the traffic other than
> > what that specific machine is sending/receiving.
>
> run ipfw in layer 2 after turning on promiscuous mode and attaching
> it to a hub.
>
> I do it all the time.
>

He specifically said in his original post that putting a machine 
between the router and his lan wasn't an option.  His question 
was,  "Is there a program where I can see whats going on from the
computer on that network?"  The answer to that question is, if he's on 
a switched network, no.  Not without a topology change.  If he can't 
put a box between the switch and router how likely is it that he's 
going to be able to put a hub between the switch and router and then 
attach a box to that?


-- 
Thanks,

Josh Paetzel



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