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

[LDM #CUD-113856]: request denial to idd.unidata.ucar.edu

Hi Wesley,

re:Hi, we have been unable to retrieve CRAFT/FSL2/FSL3 data from 
> since 00Z 5 May 2013.  We were able to push EXP data from that period.
> We are going to upgrade to LDM 6.11.4 to see if that helps.

Upgrading your LDM installation should have no effect on this.

> Are we being blocked at IDD?

No.  We have not instituted any blocks from the toplevel IDD relay node,
idd.unidata.ucar.edu, recently.

> Our old info is:
> edu.ttu.dhcp wn035.dhcp.ttu.edu [6.0.14]

> This is the new install:
> edu.ttu.wind wedgefest.wind.ttu.edu [6.11.4]

The problem is that neither your old machine, wn035.dhcp.ttu.edu,
nor the new one, wedgefest.wind.ttu.edu, have DNS setup for them.
The following demonstrates this:

% nslookup wn035.dhcp.ttu.edu
Server:  laraine.unidata.ucar.edu

*** laraine.unidata.ucar.edu can't find wn035.dhcp.ttu.edu: Non-existent 

% nslookup wedgefest.wind.ttu.edu
Server:  laraine.unidata.ucar.edu

Non-authoritative answer:
Name:    wnnh002.wind.ttu.edu
Aliases:  wedgefest.wind.ttu.edu

/home/yoksas% nslookup
Server:  laraine.unidata.ucar.edu

*** laraine.unidata.ucar.edu can't find Non-existent host/domain

In the first case (for wn035.dhcp.ttu.edu), we are unable to do a name -> IP 
In the second, name -> IP exists, but the reverse, IP -> name, does not.  The
ability to do IP -> name lookups is what is needed by the LDM since it needs
this to verify ALLOWs in ~ldm/etc/ldmd.conf.

> Other sites at Texas Tech that are working:
> edu.ttu.hpcc realtime.hpcc.ttu.edu [6.10.1]

I do not think that LDM REQUESTs from realtime.hpcc.ttu.edu to any
machine in the unidata.ucar.edu (or more general ucar.edu) domain
since it also does not have DNS that provides for IP -> name lookup.

> edu.ttu.tosm meso-file1.tosm.ttu.edu [6.11.0]

There is forward and reverse DNS for meso-file1.tosm.ttu.edu, so
it should be able to REQUEST from idd.unidata.ucar.edu. You can
test this as follows:

<login to meso-file1.tosm.ttu.edu as 'ldm'>
notifyme -vl- -f ANY -h idd.unidata.ucar.edu

This should show that the 'notifyme' REQUEST is honored.

Please check with your department/college/university network folks to
get DNS for your machine(s) fully setup.  As soon as it is, your
LDM REQUEST(s) will be ALLOWed by idd.unidata.ucar.edu.


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: CUD-113856
Department: Support LDM
Priority: Normal
Status: Closed

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.