[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[IDD #OJU-555308]: Connection Request...

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDD #OJU-555308]: Connection Request...
  • Date: Wed, 28 Sep 2011 15:20:55 -0600
Hi Scott,

re:
> We're not having any luck receiving data from you.  These are the request
> lines in my ldmd.conf:
> 
> REQUEST IDS|DDPLUS  ".*"  idd.cise-nsf.gov
> REQUEST UNIWISC     ".*"  idd.cise-nsf.gov
> 
> My server name is ldm.cicsnc.org IP 198.85.226.20

I just looked through the LDM log files on idd.cise-nsf.gov and see repeated
connection (REQUEST) attempts by 198.85.226.2.  A quick check shows that
there is no forward (IP -> name) DNS for this machine:

% nslookup 198.85.226.2
Server:         127.0.0.1
Address:        127.0.0.1#53

** server can't find 2.226.85.198.in-addr.arpa.: NXDOMAIN

The connection attempts started at 10:13:40 on September 26.

re:
> We have reverse DNS working but my logs still say I'm unable to connect to
> your server.  We've checked my firewalls and we're able to get out and in.
> As far as we can tell, we're good.  Any help you can give us will be greatly
> appreciated!

I see _no_ connection attempts by any named machine in the cicsnc.org domain,
so the ALLOW that I setup previously is not being triggered.

In order force acceptance of feed REQUEST attempts from 198.85.226.2, I
have hardwired an IP <-> name correspondence in the /etc/hosts file
on idd.cise-nsf.gov.  The next time that 198.85.226.2 attempts to connect
it should be recognized by the LDM as ldm.cicsnc.org, and data should
start flowing because of the ALLOW that is in place.

re:
> Thank you very much,

Any idea why your machine would be recognized as 198.85.226.2?

Cheers,

Tom
--
****************************************************************************
Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
----------------------------------------------------------------------------
Unidata HomePage                       http://www.unidata.ucar.edu
****************************************************************************


Ticket Details
===================
Ticket ID: OJU-555308
Department: Support IDD
Priority: Normal
Status: Closed