Network monitoring tools

[Steve Phillips]

What your looking for is something like netflow, which can be a little 
daunting to setup unless you have a semi-decent cisco or like router that 
can do flow exports. in this case look for something like cflowd 
(http://www.freshmeat.net has lots of good resources for this sort of 
thing) or the perl netflow collector (cant recall the exact url but a web 
search for it should find stuff)

Failing that, ntop and nacctd (netacct) may also provide you with the 
information you require.

-- 
Steve.

On Tue, 17 Aug 2004, Ryan Golhar wrote:

> Unfortunately the switch is out of our control, and I don't have access
> to it.  So, instead what I've done is used tcpdump to capture packets on
> the server and one of the workstations.
>
> I tried using ethereal to generate some statistics from the tcpdump
> capture, but didn't get what I was hoping for.  Basically, I'd like to
> break down the network usage hourly to see who is using up bandwidth,
> what the IPs are responsible.  Web-based graphs would be nice to get
> quick overall views.
>
> I tried searching on google for any tools that do this and surprisingly
> in the hugh lists that came back, none of them do this.  Any one have
> any recommendations?
>
> Ryan
>
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Ed Wilts
> Sent: Thursday, August 12, 2004 11:11 AM
> To: golharam at umdnj.edu; General Red Hat Linux discussion list
> Subject: Re: Network monitoring tools
>
>
> On Thu, Aug 12, 2004 at 10:43:09AM -0400, Ryan Golhar wrote:
>> Can anyone recommend a good, free network monitoring tool?
>>
>> I have a lab of about 20 Linux boxes connected to a switch.  It seems
>> like every once in a while, the performance of all the machines drops
>> dramatically, and I believe its related to the network, as all the
>> home directories are NFS mounted, but not sure where.
>>
>> I'd like to get some sort of an idea of network usage and what is
>> taking up the bandwidth.
>
> It depends on the switch. If the switch is snmp-cabable, then install
> mrtg.  You can then monitor the traffic on every switch port.  Once
> you've got the port hammered down, use something like ethereal to figure
> out what the traffic is.
>
> --
> Ed Wilts, RHCE
> Mounds View, MN, USA
> mailto:ewilts at ewilts.org
> Member #1, Red Hat Community Ambassador Program
>
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>