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20040401: access to UNIWSIC imagery (cont.)

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  • Subject: 20040401: access to UNIWSIC imagery (cont.)
  • Date: Thu, 01 Apr 2004 12:11:57 -0700
>From: "Luis A. Lopez" <address@hidden>
>Organization: UPRM
>Keywords: 200404011627.i31GRGCT021091 IDD DNS name lookup

Hi Luis,

>The hostname is climatemaster.uprm.edu (ip: 136.145.61.107).

I verified reverse name lookup (name -> IP):

% nslookup climatemaster.uprm.edu
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

Non-authoritative answer:
Name:    climatemaster.uprm.edu
Address:  136.145.61.107

but not the forward (IP -> name):

% nslookup 136.145.61.107
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

*** laraine.unidata.ucar.edu can't find 136.145.61.107:Server failed

Without both, the upstream LDM will need to add the definition into
/etc/hosts.  We don't like to do this since it is brittle.  Please
let me know when both forward and reverse name lookup are available.

In order to test feeding you, please add a request for the UNIWISC
imagery to your ~ldm/etc/ldmd.conf file:

request UNIWISC ".*"    atm.geo.nsf.gov

I will logon to the server (atm) and verify that it will refuse to
serve you until both forward and reverse name lookup are supported
for climatemaster.  Please let me know as soon as you have added
the request and started your LDM.

>We have a
>firewall and probably I need to open ports to the computer that has the
>files we need.  Thank you for your response.

The only port used by the LDM is 388/tcp.

Since you are going to be using McIDAS, you will need to open ports
112, 500, and 503, all for tcp.  This is needed _if_ you will be doing
remote ADDE access to other machines, or if you intend to open your
machine to remote ADDE access from other machines.  A quick word is
needed for why there are three ports for McIDAS:  originally, all data
transfers were done using port 500 and all transfers were
uncompressed.  SSEC added 'compress' compressed transfers through port
503 a couple of years later.  Most recently, 'gzip' compressed
transfers were added through port 112.  McIDAS is transitioning to use
of only port 112 (since it is registered with Iana for McIDAS data
transmission), but the full transition is still one or two years out.

Cheers,

Tom
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