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Date:      Sat, 4 May 2002 18:10:35 +1000
From:      Stanley Hopcroft <Stanley.Hopcroft@IPAustralia.Gov.AU>
To:        Tony Saign <tony@saign.com>
Cc:        FreeBSD-ISP@FreeBSD.ORG
Subject:   Re: Perl scripts that monitor network connection?
Message-ID:  <20020504181033.A194@IPAustralia.Gov.AU>
In-Reply-To: <000601c1f324$1ba0cda0$1401a8c0@frankenmobl>; from tony@saign.com on Fri, May 03, 2002 at 09:28:14PM -0700
References:  <000601c1f324$1ba0cda0$1401a8c0@frankenmobl>

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Dear Sir,

On Fri, May 03, 2002 at 09:28:14PM -0700, Tony Saign wrote:
> Recently (last night) for 3 hours my connection was experiencing some
> SERIOUS problems!
> (i.e. destination net unreachable, up to 47% packet from my router to
> theirs etc.)
> 
> This made me realize I need to monitor this connection VERY closely.
> Until the issues are resolved.
> 
> Can anyone recommend any network connection monitoring scripts that
> could be scheduled as cron jobs, and possibly emails the results to me?
> Or a good open-source package?
> 
> Thanks,
> 
> -Tony
>

Netsaint/Nagios (http://www.Netsaint.ORG) 

This will schedule service checks periodically, act on thresholds, log
the results, notify and if necessary escalate or act programmatically.

In this case, check_ping - from the standard check plugins [distinct
from Netsaint] could be used to respond with a WARNING or CRITICAL state
depending on RTA or packet loss ratio.

Both Netsaint and plugins are in ports collection.

In your case, acute episodic poor performance, you might be better
served by intensive monitoring with MRTG or a continuous ping and a
packet capture.


Yours sincerely.

-- 
------------------------------------------------------------------------
Stanley Hopcroft                                      Network Specialist
------------------------------------------------------------------------

'...No man is an island, entire of itself; every man is a piece of the
continent, a part of the main. If a clod be washed away by the sea,
Europe is the less, as well as if a promontory were, as well as if a
manor of thy friend's or of thine own were. Any man's death diminishes
me, because I am involved in mankind; and therefore never send to know
for whom the bell tolls; it tolls for thee...'

from Meditation 17, J Donne.

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