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20030916:Netcheck Results

Hi Arnold,

Netcheck uses ping and traceroute, for its use..

PING is part of ICMP so I do not think the netcheck results wold be useful
if not accepting any ICMP traffic....

How has this affected the LDM..I see quite a blip on the 14th, but is
seems smooth now..

Please see:

http://www.unidata.ucar.edu/staff/chiz/rtstats/siteindex.shtml?vapor.soest.hawaii.edu

Let us know if we can help further..

Cheers,

Jeff
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Jeff Weber                                    address@hidden        :
Unidata Program Center                        PH:303-497-8676        :
University Corp for Atmospheric Research      3300 Mitchell Ln       :
http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000  :
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On Tue, 16 Sep 2003, Unidata Support wrote:

>
> ------- Forwarded Message
>
> >To: <address@hidden>
> >cc: Unidata User <address@hidden>
> >From: <address@hidden>
> >Subject: Re: Netcheck Results
> >Organization: UCAR/Unidata
> >Keywords: 200309161541.h8GFfpLd025164
>
>   This message is in MIME format.  The first part should be readable text,
>   while the remaining parts are likely unreadable without MIME-aware tools.
>   Send mail to address@hidden for more info.
>
> ---559023410-758783491-1063726901=:24936
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> Good Morning Support at Unidata
>
> At our University of Hawaii School of Ocean and Earth Science and
> Technology (SOEST), the latest problem with MS Windows XP/2000 PCs and
> their bug/feature has affected two PCs.  And those computers managed to
> significently reduce our network traffic throughput as they initiated
> denial of services attacks.  As a result of this, the System
> Administration of our school has turned off all ICMP traffic into and out
> of our domain (soest.hawaii.edu).  This results in the netcheck perl
> script to always fail with the default 20% treshold.  So I have set the
> treshold to 101% but am now wondering if it is usefull to continue to run
> the netcheck cron job as long as ICMP traffic is blocked?  The attached
> files is a sample of output of "netcheck -t 101".  Our systems folks are
> particularly sensitive to ICMP traffic as until a firewall was installed a
> number of years ago, our domain was a prime target/initiator for denial of
> service attacks.
>
> Note on Submitting Support Requests:
> I had first gone to your support web page at
>       http://my.unidata.ucar.edu/content/support/email_support.php
> but could not see a quick or convenient way to include email messages in a
> support request.  For that reason I chose to send this request using email
> to the support@unidata maillist.
>
> Arnold Hori/UH Meteorology/ITspecialist until my Sept. 30th retirement/
>
>
>
> On Mon, 15 Sep 2003, Unidata User wrote:
>
> > netcheck Version 1.02: Sep 16 00:05:46 UTC
> >
> > 128.95.89.38: 100% packet loss
> > sunny.atmos.washington.edu: 100% packet loss
> >
>
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