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Re: 20001114: ldmping

Unidata Support wrote:
> 
> ------- Forwarded Message
> 
> >From: "Curtis James" <address@hidden>
> >Organization: Embry Riddle
> >Keywords: 200011140024.eAE0OwO23364 LDM ldmping
> 
> 
> Hi Anne,
> 
> I have not been able to set up a successful data feed from the host
> typhoon.atmos.ucla.edu. Under the direction of Steve Weber, the UCLA
> ldm manager has added an allow line with our domain name
> (jupiter.pr.erau.edu) to their ldmd.conf file. However, I am still
> unable to raise their ldm server using ldmping. The output that I get
> is as follows:
> 
> Nov 13 22:22:25      State     Elapsed Port Remote_Host      rpc_stat
> Nov 13 22:22:25  ADDRESSED    0.207332    0 typhoon.atmos.ucla.edu  RPC:
> Unable to receive; errno = Connection reset by peer.
> 
> However, I did attempt the ping command, and was told that typhoon was
> alive. The only conclusion that I am drawing here is that perhaps there
> is a problem with security. However, my system administrator tells me
> that typhoon is allowed to transfer data to our system. Any ideas?
> 
> Thanks,
> Curtis James
> 
> P.S. I really enjoyed the workshop last month. It was well worth my time.
> 
> 
> ______________________________ Forward Header 
> __________________________________
> Subject: Re: Re[2]: Access to ldm server at UCLA
> Author:  James Murakami <address@hidden> at Internet-mail
> Date:    11/13/00 4:25 PM
> 
> Curtis:
> 
> I am going to replace the allow section with the numerical
> ip address. Hopefully, this will correct the problem.
> 
> Since I'm not a programmer, I couldn't help with the error
> below. Looks like a question for address@hidden.
> 
> James
> 
> --------------------------------------
> James Murakami
> Staff Meteorologist/Student Affairs
> Department of Atmospheric Sciences
> University of California, Los Angeles
> 405 Hilgard Ave.
> Los Angeles, CA  90095-1565
> 
> 
>    e-mail:  address@hidden
> telephone:  310-825-2418
>       Fax:  310-206-5219
> ---------------------------------------
> 
> >
> >      Hi James,
> >
> >         Thanks for the quick response. I knew that you were going to allow
> >      us to feed from your site, but I wasn't sure if you had done it yet or
> >      not since ldmping wasn't successful. Two months back when you first
> >      "allowed" us to feed from your site, we had problems installing ldm.
> >      Only until after the ldm workshop have I been able to successfully
> >      install ldm (at least I think I was successful).
> >         I still can't raise typhoon using ldmping. It appears that there
> >      may be firewall issues on our end, or perhaps you need the numerical
> >      ip address for jupiter.pr.erau.edu (198.60.3.128).
> >
> >      The error message that I receive while running ldmping is
> >      Nov 13 22:22:25      State     Elapsed Port Remote_Host      rpc_stat
> >      Nov 13 22:22:25  ADDRESSED    0.207332    0 typhoon.atmos.ucla.edu  
> > RPC:
> 
> >      Unable to receive; errno = Connection reset by peer.
> >
> >         Any ideas what my problem may be?
> >
> >      Thanks,
> >      Curtis
> 
> The following is an attached File item from cc:Mail.  It contains
> information that had to be encoded to ensure successful transmission
> through various mail systems.  To decode the file use the UUDECODE
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> --------------------------------- Cut Here ---------------------------------
> 
> Received: from cisk.atmos.ucla.edu by ccmail.pr.erau.edu (SMTPLINK V2.11.01)
>     ; Mon, 13 Nov 00 16:25:10 mst
> Return-Path: <address@hidden>
> Received: (from tenki@localhost)
>     by cisk.atmos.ucla.edu (8.8.8+Sun/8.8.8) id PAA05250
>     for address@hidden; Mon, 13 Nov 2000 15:24:01 -0800 (PST)
> From: James Murakami <address@hidden>
> Message-Id: <address@hidden>
> Subject: Re: Re[2]: Access to ldm server at UCLA
> To: address@hidden (Curtis James)
> Date: Mon, 13 Nov 2000 15:24:01 -0800 (PST)
> In-Reply-To: <address@hidden> from "Curtis James" at Nov 13, 2000 03:54:32 PM
> X-Mailer: ELM [version 2.5 PL2]
> 
> ------- End of Forwarded Message


Hi Curtis!

There is a problem with the name service somewhere on your end.  Here's the 
story:

For security reasons, the ldm wants to do a reverse name lookup for sites 
requesting to be fed.  This is, an 'nslookup name' must return the same 
information as an 'nslookup IP_addr'.  But for your machine, this doesn't 
happen.  Here's what I get:
------
(anne) imogene:/upc/share/classes 24 % nslookup jupiter.pr.erau.edu
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

Name:    jupiter.pr.erau.edu
Address:  198.60.3.28

(anne) imogene:/upc/share/classes 25 % nslookup 198.60.3.28
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

*** laraine.unidata.ucar.edu can't find 198.60.3.28: Non-existent host/domain
------
If this isn't successful, you will be denied service.

Looking further, there appear to be problems with your name servers.  The first 
server, slab.pr.ERAU.edu, maps the hostname to the IP address, but not the 
reverse (see *** and **** below).  The second server, web.pr.ERAU.edu, doesn't 
respond (see +++ and ++++ below).
-----
(anne) imogene:/upc/share/classes 30 % nslookup
Default Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

> set q=any
> jupiter.pr.erau.edu
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

Non-authoritative answer:
jupiter.pr.erau.edu     internet address = 198.60.3.28

Authoritative answers can be found from:
pr.ERAU.edu     nameserver = slab.pr.ERAU.edu
pr.ERAU.edu     nameserver = web.pr.ERAU.edu
slab.pr.ERAU.edu        internet address = 192.101.135.10
web.pr.ERAU.edu internet address = 192.101.135.9
> server slab.pr.ERAU.edu
Default Server:  slab.pr.ERAU.edu
Address:  192.101.135.10

> jupiter.pr.erau.edu  ***
Server:  slab.pr.ERAU.edu
Address:  192.101.135.10

jupiter.pr.erau.edu     internet address = 198.60.3.28
pr.erau.edu     nameserver = slab.pr.erau.edu
pr.erau.edu     nameserver = web.pr.erau.edu
slab.pr.erau.edu        internet address = 192.101.135.10
web.pr.erau.edu internet address = 192.101.135.9
> 198.60.3.28  ****
Server:  slab.pr.ERAU.edu
Address:  192.101.135.10

*** slab.pr.ERAU.edu can't find 198.60.3.28: Non-existent host/domain
> server web.pr.ERAU.edu
Default Server:  web.pr.ERAU.edu
Address:  192.101.135.9

> jupiter.pr.erau.edu  +++
Server:  web.pr.ERAU.edu
Address:  192.101.135.9

*** web.pr.ERAU.edu can't find jupiter.pr.erau.edu: No response from server
> 198.60.3.28  ++++
Server:  web.pr.ERAU.edu
Address:  192.101.135.9

*** web.pr.ERAU.edu can't find 198.60.3.28: No response from server
------
So, this is something you need to get straightened out on your end.  I'd start 
by asking your system administrator, who may point you to someone else.

Good luck, and let me know what happens.

I'm glad you liked the workshop!  All feedback is appreciated, but the positive 
ones always brighten my day!

Anne
-- 
***************************************************
Anne Wilson                     UCAR Unidata Program            
address@hidden                 P.O. Box 3000
                                  Boulder, CO  80307
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