Tim,
One other thought, what kind of a DSL modem do you have? Does it allow you to
do SNMP monitoring? If so you could use MRTG to get overall bandwidth utilization. Now
combine that with ethereal, etherape, and maybe ntop and you should what you are
looking for.
Garl
-----Original Message-----
From: Grigsby, Garl
Sent: Monday, March 03, 2003 9:22 PM
To: [EMAIL PROTECTED]
Subject: RE: [Eug-lug]network monitoring?
Tim,
To run ntop (or ethereal) and see any meaningful traffic you either need to be
on a hub, have a connection to a managed switch that you can manipulate, or put your
machine in between the firewall and the switch so that it acts as a bridge.
A hub works kind of like a big room where all the connections "shout" the
information from one port to another, so everybody can hear everything. A switch works
more like a the old phone switches you see in the movies where an operator connects a
wire from one jack (port) to another. In a switch you can only see traffic to and from
your machine.
In the setup I have here we have our WAN connection going into port 13 of our
backbone switch. Using the management interface of this switch I have configured port
14 to be a mirror of port 13. The mirrored port is just a read-only port so I have a
second NIC in my network monitoring box to 'listen' to the WAN traffic (This card does
not have an IP assigned to it) This way I can hear(? see?) all of the traffic between
our LAN and the WAN connection. Personally I use a combination of ntop, iptraf,
ethereal, and etherape to view connections across our WAN.
Hope this helps.
Garl
-----Original Message-----
From: Timothy Bolz [mailto:[EMAIL PROTECTED]
Sent: Monday, March 03, 2003 6:56 PM
To: [EMAIL PROTECTED]
Subject: Re: [Eug-lug]network monitoring?
Bob
I am directly connected to a switch which and all the homepna switches are
connected to the same switch . I have one of the fastest connections. So it
sounds like I can use Ethereal and possibly ntop. Ntop looks like it would
work nice. Ethereal looks more invasive than I'd like to get. Ntop also
looks like it has a nice web interface and I like the fact it shows the time
the most traffic is. So it looks like anyone on a network can run ntop?
Thanks
Tim
On Monday 03 March 2003 04:50 pm, you wrote:
> Timothy Bolz wrote:
> > Thank you for responding. I work at a hotel about 2 months back we got
> > high speed internet for our rooms. It's a homepna system. We have DSL
> > to the hotel and it's split from there. The company who installed and
> > support it is http://www.trinicor.com . Half the hotel has high speed.
> > They Managers need a usage log to see if a lot of people are using it and
> > if all the rooms are being used then they would install the rest of the
> > hotel.
>
> Is there a place where you can plug your computer in between
> Trinicor's gateway and the rooms? If so, plug it in, fire up
> Ethereal, and see what you get.
>
> If you see traffic (you might want to go to a room and create some
> traffic), you're ready. If not, either find a different place to plug
> your box in or wait for Trinicor to implement the logging.
>
> As for logging and collecting, check out ntop. It is very featureful,
> but it was easy to install and set up on Debian (about two minutes).
> I don't know for certain that it'll give you the usage stats you
> want, but it looks likely.
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