[IGSMAIL-31] Software KOSG GPS receiver

[Danny]

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IGS Electronic Mail       29-JUN-1992 16:37:26       Message Number 31
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                   THIS FILE CONTAINS 2 MESSAGES
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>From:    Danny van Loon.
Subject: Software KOSG GPS receiver
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Since Wednesday 24 June 1992 the KOSG ROGUE SNR-8 GPS receiver
is running the Meenix 7.00.1 and the CONAN 4.2 software.
Regards, Danny van Loon.

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>From:    Dr Peter Morgan
Subject: DATE PROBLEMS FOR THE UNWARY
         ----------------------------


I saw this on the news as prob some of you too. It could be nasty but is
not yet a problem in our work.
> 
> 
Path: csc.canberra.edu.au!manuel!munnari.oz.au!spool.mu.edu!think.com!sdd.hp.com!swrinde!gatech!utkcs2!shuford
>From: shuford at cs.utk.edu (Richard Shuford)
Newsgroups: vmsnet.networks.tcp-ip.cmu-tek,vmsnet.networks.misc,comp.mail.misc
Subject: network disaster plan
Summary: plan ahead
Keywords: network, disaster, recovery
Message-ID: <l48337INNkmu at utkcs2.cs.utk.edu>
Date: 21 Jun 92 04:58:15 GMT
Article-I.D.: utkcs2.l48337INNkmu
Expires: 7 Jul 1992 23:24:25 GMT
Sender: shuford at cs.utk.edu
Followup-To: vmsnet.networks.misc
Organization: University of Tennessee, Knoxville--Dept. of Computer Science
Lines: 50
NNTP-Posting-Host: duncan.cs.utk.edu
 
> A few days ago, VAX/VMS computer systems running recent versions of
> the CMU-Tek TCP/IP networking software experienced a systematic
> failure triggered by the inexorable march of time: a date field
> overflowed, and all TCP sessions would disconnect immediately after
> establishment.
> 
> The problem was first noticed in Japan, not too far from the
> International Date Line, and the systematic failure marched west from
> timezone to timezone.  Some system administrators in the Western
> Hemisphere did receive electronic-mail notification of the impending
> problem, but only when the messages took a route that allowed delivery
> to the doomed systems before the network connectivity was lost.
> 
> There are at least two things that this event teaches:
> 
>  (1) Anybody who writes software that manipulates dates and times
>      must check all limit values and special cases, at the peril
>      of inadvertently creating a timebomb.
> 
>  (2) If interorganization network links are important to your site,
>      you are well advised to have a network disaster plan.  
> 
>      - Think about how you can contact your network neighbors if
>        the network is unusable.  You may know everybody's e-mail
>        address by heart, but do you know the telephone number to
>        call your neighbor at his office?  At his home?
> 
>      - Do any provisions need to be made for local substitutes
>        of services that are normally obtained over the network?
>        This could be name services, weather reports, or lots of
>        things.
> 
>      - Think about how to cope with an extended period of network
>        downtime.  Do you need a formulate a policy how long your
>        alternate mail-exchanger site should retain e-mail that has
>        been piling up for weeks?
> 
>        If you have one leased line through which all your traffic
>        with the outside world flows, it would be prudent to invent
>        some alternate emergency channel of communication.  Maybe
>        you can get your unreachable neighbor to dump queued-up 
>        mail and news to a magtape and hire a taxicab to carry it
>        to you.  Or maybe you can dust off that old modem and set
>        up an emergency dial-up link.  Once a year, amateur-radio
>        operators have a Field Day, when they test their equipment
>        under emergency conditions.  Maybe you could arrange for
> -- 
>  ....Richard S. Shuford  | "Food gained by fraud tastes sweet to a man,
>  ....shuford at cs.utk.edu  |  but he ends up with a mouth full of gravel."
>  ....BIX: richard        |  Proverbs 15:17 NIV
> 

from Peter Morgan