[LON-CAPA-admin] unable to contact DNS

[Stuart Raeburn]

Hi Bob,

> Tue Nov 18 09:49:29 2014 (16563): unable to contact DNS defaulting to on
> disk file dns_domain.tab

I would recommend confirming that the ca-certificates package is installed.

yum info ca-certificates

and, if not, install it:

yum install ca-certificates

I would also recommend testing web requests to  
https://s10.lite.msu.edu/ by using: openssl s_client -connect  
s10.lite.msu.edu:443 -state

I am seeing some requests for http://s10.lite.msu.edu/adm/dns/domain  
from 128.226.130.232 in the access_log

128.226.130.232 - - [18/Nov/2014:09:49:28 -0500] "GET /adm/dns/domain  
HTTP/1.1" 302 305

but I am not seeing the subsequent request for  
https://s10.lite.msu.edu/adm/dns/domain in the ssl_access_log.

You could also try:

wget https://s10.lite.msu.edu/adm/dns/domain

and see what is reported by wget.


Stuart Raeburn
LON-CAPA Academic Consortium


Quoting Bob Gonzales <rgonzal at binghamton.edu>:

> Hi,
>
> I put my centos 7, loncapa 2.11 machine on line and I am seeing the
> following entries intersperse throughout my lonnet.log:
>
> Tue Nov 18 09:49:29 2014 (16563): unable to contact DNS defaulting to on
> disk file dns_domain.tab
>
> I can log on but it's a little slow entering a course.  I don't know
> whether that's due to DNS or just building cache's.
>
> This is a hardware upgrade of an existing access server,
> loncapa5.chem.binghamton.edu.
>
> Any help would be appreciated.
>
> Thanks,
> Bob Gonzales
> Chemistry Dept
> Binghamton University