[Freeipa-users] Unable to ssh after establishing trust

Tue Jul 12 18:40:22 UTC 2016

+freeipa-users list

      From: pgb205 <pgb205 at yahoo.com>
 To: Sumit Bose <sbose at redhat.com> 
 Sent: Tuesday, July 12, 2016 2:12 PM
 Subject: Re: [Freeipa-users] Unable to ssh after establishing trust

Sumit, thanks for replying
So the first issue is my fault, probably from when I was sanitizing logs. 
our active directory domain is ad_domain.local, but users would expect to login as userid at ad_domain.com or just userid.for ipa the kerberos realm is IPA_DOMAIN.INTERNAL and domain is ipa_domain.internal.
ewr-fipa_server used to be old trial server so I am not sure why it's still in the dns lookup results. I'll check this part further.
Lastly. only the connection to one of the domain controllers on AD side is open. As discussed previously with Alexandr BokovoyI forced, in /etc/krb5.conf, a connection to this single, accessible domain controller. Are there any other files where I would needto lock down the connections between ipa->ad so that all traffic goes to specific active directory domain controller?
thanks again for replying so quickly.

      From: Sumit Bose <sbose at redhat.com>
 To: pgb205 <pgb205 at yahoo.com> 
Cc: Sumit Bose <sbose at redhat.com>
 Sent: Tuesday, July 12, 2016 5:37 AM
 Subject: Re: [Freeipa-users] Unable to ssh after establishing trust

On Mon, Jul 11, 2016 at 09:14:03PM +0000, pgb205 wrote:
> Sumit, 
> sssd log files attached with debug=10 in all sections.I have attempted several logins for comparison as well as kinit commands

I came across two issues in the logs.

First it looks like you use 'user at AD_DOMAIN.LOCAL' at the login prompt
but there seem to be an alternative domain suffix 'AD_DOMAIN.COM' on the
AD side and user principal attributes 'user at AD_DOMAIN.COM'. Currently
FreeIPA cannot resolve those principals correctly. It was planned for
IPA 4.4.0 and SSSD 1.14.0 but because of an issue found in 4.4.0 it will
be available (hopefully) with IPA 4.4.1 and SSSD 1.14.1. In the meantime
please try to work-around suggested at the end of
http://osdir.com/ml/freeipa-users/2016-01/msg00304.html . When trying to
authenticate with user at AD_DOMAIN.COM SSSD looks for a server called
ewr-fipa_server.ad_domain.com but cannot find it an return the error code
for "Cannot contact any KDC for requested realm".

Second there are some issues access AD DCs via LDAP. SSSD tries to
connect to mm-sfdc01.ad_domain.local and mm-tokyo-02.ad_domain.local but
both fails. It is not clear from the logs if already the DNS lookup for
those fails or if the connection itself runs into a timeout. In the
former case you should make sure that the names can be resolved in the
IPA server in the latter you can try to increase ldap_network_timeout
(see man sssd-ldap for details). Since SSSD cannot connect to the DCs it
switches the AD domains to offline. The authentication request is
handled offline as well but since there are no cached credentials you
get the permission denied error.

HTH

bye,
Sumit

> 
>      From: Sumit Bose <sbose at redhat.com>
>  To: pgb205 <pgb205 at yahoo.com> 
> Cc: "Freeipa-users at redhat.com" <Freeipa-users at redhat.com>
>  Sent: Monday, July 11, 2016 3:06 AM
>  Subject: Re: [Freeipa-users] Unable to ssh after establishing trust
>    
> On Mon, Jul 11, 2016 at 03:46:57AM +0000, pgb205 wrote:
> > I have successfully established trust and am able to obtain ticket granting ticketkinit user at AD_DOMAIN.COMI can also do kinit admin at IPA_DOMAIN.COMssh admin at IPA_DOMAIN.COM also works
> > however, ssh user at AD_DOMAIN.COM or user at ad_domain.com fails
> > I have checked that there are no hbac rules other then the default allow_all rule
> > in sssd_ssh.log see
> > permission denied (6) error in sssd_ipa.domain.log file I see
> > pam_handler_callback 6 permission_denied
> > in sssd_nss.log Unable to get information from Data ProviderError: 3 Account info lookup failedWill try to return what we have in cache
> > in /var/log/secure received for user user at AD_DOMAIN.COM: 6 (Permission denied) 
> > 
> > I can provided full logs if necessary to diagnose the above problem.
> 
> Yes, full SSSD logs with debug_level=10 would be best.
> 
> > ----------Additionally, I would like to be able to login as user not user at AD_DOMAIN.COM
> > My understanding that only thing that I have to change to make this happen is /etc/krb5.conffor line 
> > [libdefaults] default_realm=AD_DOMAN.COM and then restarting ipa services.
> 
> No, please do not change the default_realm. This is not related to the
> issues you are seeing.
> 
> bye,
> Sumit
> 
> > However, when I do this I get failure to restart Samba service
> 
> > -- 
> > Manage your subscription for the Freeipa-users mailing list:
> > https://www.redhat.com/mailman/listinfo/freeipa-users
> > Go to http://freeipa.org for more info on the project
> 
> 
> 
>  

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