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Re: [Fwd: [Fwd: Re: LDM access]]

Robert Leche wrote:
> 
> Hello Anne,
> I am trying to allow aqua.nsstc.uah.edu to from sirocco.srcc.lsu.edu or
> nafhat.srcc.lsu.edu. I am not having much luck. I added an entry to
> allow ANY idd
> to both sirocco and nafhat ldmd.conf configure files and restarted ldm.
> 
> The following is a snip of Nafhat's ldmd.log:
> 
> Feb 28 19:40:03 nafhat motherlode[10686]: FEEDME(motherlode.ucar.edu):
> OK
> Feb 28 19:40:03 nafhat mapmaker[10687]:
> FEEDME(mapmaker.meteor.wisc.edu): OK
> Feb 28 19:40:05 nafhat localhost[10694]: Connection from localhost
> Feb 28 19:40:05 nafhat localhost[10694]: Connection reset by peer
> Feb 28 19:40:05 nafhat localhost[10694]: Exiting
> Feb 28 19:54:51 nafhat rpc.ldmd[10683]: gethostbyaddr: failed for
> 192.67.108.50
> Feb 28 19:54:51 nafhat rpc.ldmd[10683]: Denying connection from
> 192.67.108.50
> Feb 28 19:55:24 nafhat rpc.ldmd[10683]: Denying connection from
> 192.67.108.50
> Feb 28 20:00:02 nafhat rpc.ldmd[10683]: Exiting
> Feb 28 20:00:02 nafhat rpc.ldmd[10683]: Terminating process group
> Feb 28 20:00:02 nafhat mapmaker[10687]: Exiting
> Feb 28 20:00:02 nafhat pqact[10685]: Exiting
> Feb 28 20:00:02 nafhat pqbinstats[10684]: Exiting
> Feb 28 20:00:02 nafhat motherlode[10686]: Exiting
> 
> Note the 192.67.108.50 address. This different from any other ldm
> client. Other LDM clients resolve to a fully qualified name. Nslookup
> correctly resolves aqua.nsstc.uah.edu to 192.67.108.50, so I do not
> believe this to be a DNS problem. However gethostbyaddr fails. Why?
> 
> Ideas?
> 
> Bob

Hi Bob,

The LDM requires that both that the name resolves to the IP address
*and* the IP address resolves to the name.  From your machine, try
'nslookup aqua.nsstc.uah.edu' and 'nslookup 192.67.108.50'.  They should
resolve to the same machine.  From my machine here 'nslookup
192.67.108.50' failed while 'nslookup aqua.nsstc.uah.edu' succeeded. 
This tells me that the reverse lookup for aqua failed.  Scott should
talk to his system administrator about this.  Either there's some table
somewhere that remains to be updated, or a recent change was made and
the 'time to live' isn't short enough so that the change was picked up.

Anne 
-- 
***************************************************
Anne Wilson                     UCAR Unidata Program            
address@hidden                 P.O. Box 3000
                                  Boulder, CO  80307
----------------------------------------------------
Unidata WWW server       http://www.unidata.ucar.edu/
****************************************************



 
> 
>   ------------------------------------------------------------------------
> 
> Subject: [Fwd: Re: LDM access]
> Date: Wed, 28 Feb 2001 10:30:28 -0600
> From: Scott Podgorny <address@hidden>
> Organization: National Space Science & Technology Center
> To: address@hidden
> 
> Robert,
> 
> It looks like I can do a ping to your machine but I can't do an ldmping.
> 
> aqua.ldm 38% ldmping sirocco.srcc.lsu.edu
> Feb 28 16:28:34      State    Elapsed Port   Remote_Host
> rpc_stat
> Feb 28 16:28:34  ADDRESSED   0.160287    0   sirocco.srcc.lsu.edu
> Unable to rec
> eive; errno = Connection reset by peer
> 
> aqua.ldm 39% ping sirocco.srcc.lsu.edu
> PING sirocco.srcc.lsu.edu (130.39.188.220): 56 data bytes
> 64 bytes from 130.39.188.220: icmp_seq=0 ttl=245 time=73 ms
> 
> -------- Original Message --------
> Subject: Re: LDM access
> Date: Wed, 28 Feb 2001 10:16:01 -0600
> From: Scott Podgorny <address@hidden>
> Organization: National Space Science & Technology Center
> To: Robert Leche <address@hidden>
> References: <address@hidden>
> <address@hidden>
> 
> Robert,
> 
> I tried again with no luck.  I changed the entry to get ANY traffic and
> still
> have a denied error from your machine.
> I can ping it just fine though.
> 
> scott
> 
> Feb 28 16:13:51 5Q:aqua localhost[29087]: Connection from localhost
> Feb 28 16:13:51 5Q:aqua localhost[29087]: Connection reset by peer
> Feb 28 16:13:51 5Q:aqua localhost[29087]: Exiting
> Feb 28 16:13:52 5Q:aqua sirocco[29078]: run_requester:
> 20010228151349.535
> TS_END
> T {{ANY,  ".*"}}
> Feb 28 16:13:52 3Q:aqua sirocco[29078]: FEEDME(sirocco.srcc.lsu.edu.):
> 7:
> Access
>  denied by remote server
> 
> Robert Leche wrote:
> 
> > Hello Scott,
> >
> > I checked sirocco.srcc.lsu.edu and found an entry for aqua.nsstc.uah.edu.
> > The entry is to allow UNIDATA traffic. I added an entry to allow ANY idd
> > data traffic. Please try acquiring LDM data again let me know your results.
> > Also, if you have problems try pinging sirocco. I will be in until 5:00cst.
> >
> > Bob
> > address@hidden
> > 225-578-5023
> >
> > Scott Podgorny wrote:
> >
> > > Bob/Alaric,
> > >
> > > I have been trying to fail over to your LDM server without success.  I'm
> > > receiving an access denied by remote server error.  Our group changed
> > > domains about 6 months ago and I'm not sure if your information has been
> > > updated since then.
> > >
> > > server:   aqua.nsstc.uah.edu
> > > ip: 192.67.108.50
> > >
> > > thanks
> > >
> > > Scott Podgorny
> > >
> > > --
> > >
> > > _______________________________________________________________________
> > > Scott Podgorny                             Phone   (256) 961-7819
> > > Research Engineer                          Fax     (256) 961-7979
> > > University of Alabama in Huntsville/ESSC   Email   address@hidden
> > > NASA Marshall Space Flight Center/SD60     Web     http://nsstc.uah.edu
> > >
> > > National Space Science & Technology Center
> > > 320 Sparkman Drive
> > > Huntsville, AL  35805
> 
> --
> 
> _______________________________________________________________________
> Scott Podgorny                             Phone   (256) 961-7819
> Research Engineer                          Fax     (256) 961-7979
> University of Alabama in Huntsville/ESSC   Email   address@hidden
> NASA Marshall Space Flight Center/SD60     Web     http://nsstc.uah.edu
> 
> National Space Science & Technology Center
> 320 Sparkman Drive
> Huntsville, AL  35805