[LON-CAPA-admin] new access servers can't connect to msu

[Bob Gonzales]

Stuart,

Sorry about not remembering the previous announcements that you made
regarding these kinds of changes.  I will contact you with the change
information.

Thank you, again!

Bob Gonzales
Binghamton University
Chemistry Dept

On Thu, Jan 25, 2018 at 10:57 AM, Stuart Raeburn <raeburn at msu.edu> wrote:

> Hi,
>
>
>> Any ideas on what to look at to fix this?
>>
>>
> Evidently, the IP addresses associated with the hostnames:
>
> loncapa.chem.binghamton.edu
> loncapa2.chem.binghamton.edu
>
> have been changed from what they were a year ago.
>
> The following seven binghamton.edu IP addresses are currently permitted
> access to the LON-CAPA ports on the msu and msudemo domain LON-CAPA servers
> by network border rules managed by MSU IT Services.
>
> 128.226.130.122
> 128.226.130.15
> 128.226.130.232
> 128.226.130.233
> 128.226.130.234
> 128.226.130.9
> 128.226.136.56
>
> Those IP addresses were included in the complete list of LON-CAPA nodes
> forwarded to MSU IT services on 1/6/2017.
>
> Of those seven, reverse DNS for the following three returns: "not found"
>
> 128.226.130.122
> 128.226.130.15
> 128.226.130.9
>
> so I am assuming two of those used to be assigned to:
> loncapa.chem.binghamton.edu and loncapa2.chem.binghamton.edu
>
> which are now:
>
> 128.226.136.82 and 128.226.136.79 respectively.
>
> If this change is to be permanent, then I will submit a request to MSU IT
> Services to adjust their network border firewall rules to remove:
> 128.226.130.122, 128.226.130.15 and 128.226.130.9, and add: 128.226.136.82
> and 128.226.136.79.
>
> MSU IT services requires at least 48 hours to update MSU network border
> rules.
>
> For more information about these changes, specific to msu, see:
>
> mail.lon-capa.org/pipermail/lon-capa-users/2017-January/005155.html
> mail.lon-capa.org/pipermail/lon-capa-admin/2017-August/003277.html
>
> My recommendation is for any domains planning to change IP addresses for
> their LON-CAPA nodes is to contact me (off-list) at least 48 hours prior to
> the change, so the new IP addresses can be sent to MSU IT Services.
>
> Note: both the old IP addresses and the new IP addresses can co-exist in
> the MSU network border rules for a time. At a later time I would then
> submit a request to MSU IT Services for removal of the old IP addresses
> from the MSU network border rules.
>
>
> Stuart Raeburn
> LON-CAPA Academic Consortium
>
>
>
> Quoting Bob Gonzales <rgonzal at binghamton.edu>:
>
> Hi,
>>
>> I've got 2 new access servers that can't connect to the msu domain.
>>
> When I
>
>> browse to the msu domain from 'Course Editor'  I get the message:
>>
>>               Directory temporarily not accessible.
>>
>> Entries from lonc.log for all msu servers are like these:
>>
>> Thu Jan 25 05:11:45 2018 (9177) [loncapa.msu.edu] [Thu Jan 25
>>
> 05:11:42
>
>> 2018: Connected to loncapa.msu.edu] <font color='red'>CRITICAL:
>>
> Failed to
>
>> make a connection with lond.</font>
>> Thu Jan 25 05:11:45 2018 (9177) [loncapa.msu.edu] [Thu Jan 25
>>
> 05:11:42
>
>> 2018: Connected to loncapa.msu.edu] <font color='blue'>WARNING:
>>
> Failing
>
>> transaction sethost</font>
>> Thu Jan 25 05:14:27 2018 (9177) [loncapa.msu.edu] [Thu Jan 25
>>
> 05:11:42
>
>> 2018: Connected to loncapa.msu.edu] <font color='red'>CRITICAL:
>>
> Failed to
>
>> make a connection with lond.</font>
>> Thu Jan 25 05:14:27 2018 (9177) [loncapa.msu.edu] [Thu Jan 25
>>
> 05:11:42
>
>> 2018: Connected to loncapa.msu.edu] <font color='blue'>WARNING:
>>
> Failing
>
>> transaction sethost</font>
>>
>> The access servers are:
>>
>> loncapa.chem.binghamton.edu - acting as a load balancer
>> loncapa2.chem.binghamton.edu - acting as a normal access server
>>
>> They are virtual machines that were cloned from my library server
>>
> virtual
>
>> machine, loncapal1.chem.binghamton.edu.  They are running Centos 7.4
>>
> and I
>
>> updated them from 2.11.1 to 2.11.2 after cloning.
>>
>> Both servers are able to connect to servers in other domains. They
>>
> seem to
>
>> be running normally with the exception of getting resources from
>>
> msu.
>
>>
>> Any ideas on what to look at to fix this?
>>
>> Thanks,
>> Bob Gonzales
>> Chemistry Dept
>> Binghamton University
>>
>
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