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[LDM #UWP-301248]: LDM Connection problem
- Subject: [LDM #UWP-301248]: LDM Connection problem
- Date: Fri, 17 Aug 2012 14:12:04 -0600
Hi Jerry,
re:
> Michael is trying to access the SPARE feed on one of our LDM servers. He is
> getting the error:
>
> "couldn't connect to LDM 6 on fred.ssec.wisc.edu using port 388; : RPC:
> Remote system error - Connection refused"
>
> He can ldmping our server. Other external users can access the ldm SPARE
> feed. (see some details below)
Actually, the ldmping output Michael sent along:
> [ldm@opc-lw-goesrpg: ~/ldm/etc]$ ldmping -i 5 -h fred.ssec.wisc.edu
> Aug 17 18:28:45 INFO: State Elapsed Port Remote_Host rpc_stat
> Aug 17 18:28:45 INFO: Resolving fred.ssec.wisc.edu to 128.104.109.245 took
> 0.032546 seconds
> Aug 17 18:29:02 INFO: Resolving fred.ssec.wisc.edu to 128.104.109.245 took
> 0.001244 seconds
> Aug 17 18:29:19 INFO: Resolving fred.ssec.wisc.edu to 128.104.109.245 took
> 0.001223 seconds
> Aug 17 18:29:36 INFO: Resolving fred.ssec.wisc.edu to 128.104.109.245 took
> 0.001181 seconds
> Aug 17 18:29:53 INFO: Resolving fred.ssec.wisc.edu to 128.104.109.245 took
> 0.001149 seconds
> Do you have any ideas why he can not connect?
shows that his LDM can _not_ connect to the LDM on fred.ssec.wisc.edu. The
output for
an LDM that can connect will look like:
$ ldmping oliver.unidata.ucar.edu
Aug 17 20:07:48 INFO: State Elapsed Port Remote_Host
rpc_stat
Aug 17 20:07:48 INFO: Resolving oliver.unidata.ucar.edu to 128.117.156.17 took
0.009147 seconds
Aug 17 20:07:48 INFO: RESPONDING 0.075321 388 oliver.unidata.ucar.edu
The RESPONDING line indicates that the upstream LDM has responded to the
ldmping.
What is the result of:
notifyme -vl- -h fred.ssec.wisc.edu
If this invocation "hangs", it is likely that Michael's LDM is not able to
contact
the LDM on fred.ssec.wisc.edu. We see two different reasons for this:
- the firewall on fred.ssec.wisc.edu is blocking the port 388 connection
attempt from
Michael's machine
- a firewall at or near Michael's machine is blocking outbound port 388
connection
attempts
Cheers,
Tom
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Ticket Details
===================
Ticket ID: UWP-301248
Department: Support LDM
Priority: Normal
Status: Closed