The mailing list for users of the eduroam Configuration Assistant Tool (CAT)

[Stefan Winter <stefan.winter AT restena.lu>]

Hello,

sorry for the late reply.

You have probably uploaded the intermediate CA, not the root one. The
root CA is required while intermediates are optional.

You can find the root CA on the web page I mentioned earlier:

https://spaces.at.internet2.edu/display/ICCS/InCommon+Cert+Types

There is a link [DER] besides the "USERTrust Secure". The root CA cert
is behind that link.

Greetings,

Stefan Winter

Am 29.05.19 um 22:41 schrieb Hunter Fuller:
> Stefan,
> 
> Thank you so much for the info. It makes perfect sense. I totally
> failed to find that mailing list post myself.
> 
> I have input those two certs, though, and CAT is showing this message:
> "Information needed! CA Certificate File"
> It's acting like I have no root loaded - but the only other root I
> could load is the AddTrust one, which seems to be the source of our
> problems.
> 
> Where can I find the root for the recommended chain?
> 
> --
> Hunter Fuller
> Router Jockey
> VBH Annex B-5
> +1 256 824 5331
> 
> Office of Information Technology
> The University of Alabama in Huntsville
> Network Engineering
> 
> On Tue, May 21, 2019 at 1:41 AM Stefan Winter <stefan.winter AT restena.lu> 
> wrote:
>>
>> Hello,
>>
>>> I have a new Windows 10 machine that will connect to eduroam just fine
>>> if I verify our cert's fingerprint manually, instead of using CAT.
>>> When I install CAT, the network configuration is added, but as soon as
>>> I click Connect, "Can't connect to this network" is displayed under
>>> the SSID name in the menu.
>>>
>>> Does anyone have any tips for collecting data about why the failure is
>>> happening? Since I am also one of our realm administrators, I was able
>>> to look on our RADIUS server logs. The client is sending what it calls
>>> a "TLS alert message" and thus the connection is rejected.
>>>
>>> I know I have loaded our root and intermediates correctly because the
>>> CAT works fine on other OSes (iOS and Linux are the ones I have access
>>> to, and have tried).
>>>
>>> Is there any place in Windows I can find more information about why
>>> it's failing, or is there anywhere else I can check? Any pointers
>>> would be appreciated.
>>
>> You are using an InCommon server certificate and have specified AddTrust
>> as the root certificate.
>>
>> There are Windows-internal issues with that. Please review this list post:
>>
>> https://lists.geant.org/sympa/arc/cat-users/2018-10/msg00236.html
>>
>> and the InCommon wiki page detailing the expected chain to a root
>> certificate:
>>
>> https://spaces.at.internet2.edu/display/ICCS/InCommon+Cert+Types
>>
>> The chain should be:
>>
>>     USERTrust Secure [DER]
>>     InCommon RSA Server CA [DER] [PEM]
>>     End-Entity Certificate
>>
>> The chain you use, while technically correct, isn't liked by Windows in
>> some circumstances. That same wiki page links to that deprecated one as
>> "Comodo's version of the chain"; the solution is to use the USERTrust
>> version as outlined above.
>>
>> Also note that "Comodo's version of the chain" becomes entirely defunct
>> in almost exactly one year from now because the root cert expires May 30
>> 10:48:38 2020 GMT. I.e. you have every reason to switch to the alternate
>> reality ASAP.
>>
>> Greetings,
>>
>> Stefan Winter
>>
>> --
>> Stefan WINTER
>> Ingenieur de Recherche
>> Fondation RESTENA - Réseau Téléinformatique de l'Education Nationale et
>> de la Recherche
>> 2, avenue de l'Université
>> L-4365 Esch-sur-Alzette
>>
>> Tel: +352 424409 1
>> Fax: +352 422473
>>
>> PGP key updated to 4096 Bit RSA - I will encrypt all mails if the
>> recipient's key is known to me
>>
>> http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC0DE6A358A39DC66
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-- 
Stefan WINTER
Ingenieur de Recherche
Fondation RESTENA - Réseau Téléinformatique de l'Education Nationale et
de la Recherche
2, avenue de l'Université
L-4365 Esch-sur-Alzette

Tel: +352 424409 1
Fax: +352 422473

PGP key updated to 4096 Bit RSA - I will encrypt all mails if the
recipient's key is known to me

http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC0DE6A358A39DC66

Attachment: 0xC0DE6A358A39DC66.asc
Description: application/pgp-keys

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Description: OpenPGP digital signature