20051114: adde.ucar.edu IP address changed; action needed (cont.)

>From: "Corcoran, William T" <address@hidden>
>Organization: Missouri State University
>Keywords: 200508291349.j7TDnujo003962 McIDAS ADDE

Hi Bill,

re: need to touch base with your IT folks
>OK.  I have set some wheels spinning with IT.

Please see below for new developments...

>I have also trashed around with some of your examples on telneting to 80
>or 500.
>
>From long ago, pagagayo.unl.edu was our backup server...same result,
>refused on port 500 (open on 80).

Yup, I tried papagayo also.

>So I looked at the web-page you have of community data servers.  I was
>able to get port 500 at weather3.admin.niu.edu and stratus.al.noaa.gov,
>but not others, atm.geo.nsf.gov  for example.

Interesting.  I only tried adde.ucar.edu, atm.geo.nsf.gov, and
papagayo.unl.edu.  Since access to all of these failed, I didn't check
any further.

>I could get into ice and unidata2 but not amrc at ssec.

OK.

>So, I changed DATALOC hosts and fired up some mcidas stuff off
>weather3.admin.niu.edu.  It, of course, works.  So, in one sense things
>are working.

Well, weather3.admin.niu.edu is currently bandwidth constrained,
but this situtation is due to change at the beginning of December
when NIU's Internet connection gets upgraded to a Gbps connection
to Internet2.  Then, the access to weather3 will be nice and fast.

>At this point, I have lower-level (not our networking specialists)
>perplexed on why some machines are open and not others.
>
>I just wondered if you cared to speculate?

Hmm...  maybe the difference is which server's ADDE access has been
configured to run with McIDAS v2004/v2005.  The difference is that
v2004 was distributed to work on any of ports 112, 500, and 503.  v2005
_only_ supports use of port 112.  I installed McIDAS v2005 on
adde.ucar.edu, atm.geo.nsf.gov, and papagayo.unl.edu and configured the
remote ADDE server on each of them to support port 112 only.  I also
did the installation on weather3.admin.niu.edu, but I have not yet
redone the remote ADDE server configuration for v2005.  I am in the
process of updating unidata2.ssec.wisc.edu, so the remote server on it
is still setup to support transfers on ports 500 and 503.

I am sorry that this did not dawn on me before this moment:

I think that your problem is that the newer servers are only talking on
port 112, and your distribution only talks on ports 500 or 503.  Now
_I_ feel dumb for overlooking this!

Tell you what...  I will change the configuration on adde.ucar.edu
and see if I can access it from cumulus...  Nope, that wasn't it.
Wait a minute, adde.ucar.edu's firewall is setup to not allow
access on ports 500 and 503...  That was it.  I can now access
adde.ucar.edu from cumulus.

So, the bottom line is that the problem was not some configuration
at your university/department, but versionitis in tryint to access
the new ADDE server from an old version of McIDAS.  Now what we
need to do is get you upgraded to a current distribution of McIDAS.

As I finish this note I see that cumulus is now accessing data on
adde.ucar.edu.  Not much yet, but it should go smoothly from now
on.

I apologize for not thinking of the version problem earlier!

Cheers,

Tom
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>From address@hidden  Tue Nov 15 07:17:35 2005

Tom:

All is well that ends well.   I had gone looking at the Mcidas web pages
at Unidata and seen the reference to port 112 also...of course it
checked out on our machine.

Anyway, I have set the wheels in motion to get a computer fairly soon (a
used, older one, but infinitely newer than cumulus), and I've actually
gotten a commitment both from hardware and software support to get a
little help with it, so maybe we can make things work a little better on
this end.  I hate to be the lowest common denominator.  

So there were some good things that eventuated from this whole deal.

Thanks again for your help.  I'll get in touch when I screw up something
with the new machine.

Bill

Dr. William T. Corcoran  http://cumulus.smsu.edu
(417) 836-5781 
Dept. Geography, Geology, and Planning
Missouri State University
901 S. National
Springfield, MO 65897