[LON-CAPA-admin] subscription updates not happening

Stuart Raeburn raeburn at msu.edu
Mon Dec 8 16:02:02 EST 2014

Hi Bob,

> For capa1, casea1, and fhwfa1, a dump of iptables shows port 5663 open for
> capa1 and fhwfa1.

The issue is with inbound access to port 5663 on the remote LON-CAPA  
servers, not with iptables rules for your own LON-CAPA library server  
(which affect inbound requests to your server), or with firewall rules  
for your own institution.

Anyway, I contacted the maintainer of fhwfa1, and the network staff  
for that domain are being contacted to resolve that issue for fhwfa1.

As regards capa1 (uwsp), I had some e-mail correspondence with the  
maintainer there some time ago, and I had reported that port 5663 was  
blocked for inbound access to the uwsp library server.  I need to  
revisit that, because it seems the issue was never resolved.

> ...  It also shows no entries for casea1 (cluster tables
> already updated?).

Yes, the authoritative cluster tables at MSU, UIUC and SFU were  
updated Friday, 12/5 after I received a response to my e-mail to the  
maintainer of the case domain; case is permanently offline, so the  
entries for case have been commented out in the cluster tables.

In summary, this is something that the other institutions need to  
resolve, and is most likely an issue with institutional firewall rules  
at the respective campus borders.

What it means for you is that whenever you update resources in the  
binghamton domain, for which these remote servers have subscriptions,  
your LON-CAPA library server will attempt to connect to the remote  
server's port 5663 to prompt it to request the updated copy of the  
resource from your library server.  That will fail, and a record will  
be written in /home/httpd/perl/logs/lonnet.perm.log  Thereafter the  
nightly (5.10 local time) run of loncron on your library server will  
attempt to complete the transaction to prompt the remote server to  
retrieve the updated file.

Stuart Raeburn
LON-CAPA Academic Consortium

Quoting Bob Gonzales <rgonzal at binghamton.edu>:

> The campus IT guys have checked the firewall at the edge of campus to the
> rest of the world and have rules to allow port 5663 inbound for all of my
> servers.  They sent a log file showing some traffic from capa1.uwsp.edu and
> vita2.ostfalia.de at 5:10 this morning.
> Since none of my servers can talk to either of these external servers it
> would seem the problem is in the campus network.
> What is the easiest way to manually generate inbound traffic on port 5663
> so that we could interactively troubleshoot this?
> Thanks,
> Bob Gonzales
> Chemistry Dept
> Binghamton University

More information about the LON-CAPA-admin mailing list