Network Monitoring

[Bill Campbell]

On Fri, Feb 18, 2005, David Bandel wrote:
>On Thu, 17 Feb 2005 21:20:17 -0600, Ben Duncan <bns at meta3.net> wrote:
>> Anyone know of a good network monitor tool (for Linux)?
>> 
>> One of my customers has a T1, and for some reason, something is eating up
>> bandwidth. A test on one of those "test my bandwidth" sites shows I am only
>> getting about 18K thru.
>> 
>> I cannot convince the Windows Admin that she has something wrong or there is
>> something going on. Her answer "Well, I'll just reboot the PDC and servers" ...
>> 
>> I would like to be the hero and isolate what (or who) is eating up the bandwidth ...
>> 
>> Thanks ...
>> 
>
>Ben, I just use: tcpdump -ni eth#
>on the system (assuming they're using a Linux router/firewall).

If you want to monitor something specific (e.g. IMAP converation between a
client and a server), the tcpflow program is great.  It creates files in
the current directory for each side of the connection, and they're
generally comprehensible by mortals.

Bill
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