[Freeipa-users] Unable to ssh after establishing trust

pgb205 pgb205 at yahoo.com
Tue Jul 19 17:30:35 UTC 2016 

Sorry, I typed things out instead of copy/paste
my etc hosts looks like:

search  ad.local127.0.0.1       localhost
# The following lines are desirable for IPv6 capable hosts::1     localhost ip6-localhost ip6-loopbackff02::1 ip6-allnodesff02::2 ip6-allrouters
10.10.10.1         ipa_server.ipa.internal    ipa_server172.19.10.10     ad_server1.ad.local172.19.10.10     ad_server2.ad.local172.19.10.10     ad_server3.ad.local
If you want I can send you the sssd logs again

      From: Sumit Bose <sbose at redhat.com>
 To: pgb205 <pgb205 at yahoo.com> 
Cc: Freeipa-users <freeipa-users at redhat.com>
 Sent: Tuesday, July 19, 2016 3:33 AM
 Subject: Re: [Freeipa-users] Unable to ssh after establishing trust
   
On Mon, Jul 18, 2016 at 09:21:07PM +0000, pgb205 wrote:
> Sumit,
> 
> I have set the names of all the Domain Controllers to be resolvable to the IP
> of the one reachable Domain Controller in /etc/hosts
> 
> /etc/hosts:
> Reachable_IP_BOX  172.10.10.1
> DC1                            172.10.10.1
> DC2                            172.10.10.1
> ...
> ...

The IP address should come first, please see man hosts for details.

> 
> However, I still see the following
> Marking SRV lookup of service 'gc_addomain.local' as 'neutral'
> Marking server dc1.addomain.local' as 'name not resolved'

Have you tried to add the fully-qualified names (dc1.addomain.local) in
the right format (see above) to /etc/hosts?

> 
> 
> Additionally I have configured 
> [domain/ipa.internal]
>      with 
> subdomain_inherit = ldap_user_principal
> ldap_user_principal = nosuchattr
> 
> 
> As far as your earlier note about seeing ewr-fipa-x1 in logs. That used to be
> the old hostname of the IPA KDC.
> After much troubleshooting I believe I got this fixed by deleting  extra
> folders in
> /var/named/dyndb-ldap/ipa/master
> Right now the only two folders are ipa.internal and <ip.adddr>.in-addr.arpa.
> I think this is what helped with this issue. but can you please confirm if it
> sounds reasonable.

Not sure how you got the additional directories but if on only have a
single IPA DNS domain the two directories are sufficient.

bye,
Sumit

> 
> 
> Ssh is still failing, possibly due to the problem 1 above. Is there anything
> else I can do to force ipa to pay attention to the /etc/hosts ?
> Or is this some other issue?
> 
> thanks
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> From: Sumit Bose <sbose at redhat.com>
> To: pgb205 <pgb205 at yahoo.com>
> Cc: Sumit Bose <sbose at redhat.com>; Freeipa-users <freeipa-users at redhat.com>
> Sent: Wednesday, July 13, 2016 5:43 AM
> Subject: Re: [Freeipa-users] Unable to ssh after establishing trust
> 
> On Tue, Jul 12, 2016 at 06:40:22PM +0000, pgb205 wrote:
> > +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.
> 
> Currently it is not possible to specify individual AD DC SSSD on the IPA
> server should talk to. We have ticket
> https://fedorahosted.org/sssd/ticket/2599 to make this possible in some
> later versions of SSSD.
> 
> Currently SSSD uses a DNS SRV lookup like _ldap._tcp.ad_domain.local to
> get a list of AD DC, then picks one to get the next nearest site for the
> IPA domain and finally tries to lookup a DC from the matching site (if
> any).
> 
> According to your logs SSSD was able to find 18 DCs with the SRV lookup.
> A call like
> 
>    dig SRV _ldap._tcp.ad_domain.local
> 
> on the IPA server should return the same list of 18 DCs.
> 
> As a work-around, or better a hack, you might want to try to set the IP
> address of all the 18 DC returned to the IP address of the only
> accessible DC in /etc/hosts. This way SSSD should have no chance to
> connect to a different DC.
> 
> bye,
> 
> Sumit
> 
> >
> >      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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