[mrtg] Re: Mrtg to monitor FTP traffic

[Daniel J McDonald]

On Fri, 2003-05-30 at 05:06, Fülöp Márton wrote:
> Thanks but it coultd't help:(
> 
> I only want to configure MTRG to monitor traffic through 21 port.
> Could this be possible?

Not terribly likely.

> I tried using cfgmaker with --snpm-options:21 but it did't work.
> Maybe I use wrong syntaxis.

That would look for an snmp daemon answering on UDP port 21 - I doubt
that's what you had in mind.

MRTG is not magic.  MRTG needs to have a counter to poll.  If there is
no counter that states "this many bytes have been transmitted for X so
far" then MRTG will not be able to produce graphs.

So, how do you create the counter?  You can, on the FTP box, create a
firewall rule that counts bytes and monitor it.  You can, on a Cisco
Router, right a rule using CAR or the Modular QOS rules that somehow
identifies the appropriate traffic and provides a counter.  You can,
using a Cisco or Juniper router, export netflow records and correlate
them with a package like flow-tools and write a gnarly script to come up
with traffic stats from that.

None of those activities are trivial to undertake - they all require
in-depth knowledge of the box being monitored, the middle-ware tools,
and MRTG.
> 
> Thanks again
> 
> Marci
> 
> to monitor FTP traffic
> 
> Fülöp Márton said:
> > Hi!
> >
> > How can I monitor FTP traffic on 21 port on 123.456.678.789 Ip address?
> > Can somebody tell me how to make cfg fort this?
> 
> configure your firewall for traffic accounting and pass that data
> to MRTG.
> 
> keep in mind ftp often uses random ports for data transfer.
> 
> nate
> 
> 
> 
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-- 
Daniel J McDonald <dan.mcdonald at austinenergy.com>
Austin Energy

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