[Freeipa-users] Unable to ssh after establishing trust

Tue Jul 19 23:30:28 UTC 2016

From: freeipa-users-bounces at redhat.com [mailto:freeipa-users-bounces at redhat.com] On Behalf Of pgb205
Sent: Wednesday, 20 July 2016 5:28 AM
To: Sumit Bose
Cc: Freeipa-users
Subject: Re: [Freeipa-users] Unable to ssh after establishing trust

well...I'm not sure what I changed, if anything, but I am able to login with my AD credentials. I have restarted ipa server and cleared sss_cache, so maybe that helped.

A few other things still remain though:

right now im logging in as jsmith at ADDOMAIN.LOCAL<mailto:jsmith at ADDOMAIN.LOCAL>
I would want it to be either jsmith at ADDOMAIN.COM<mailto:jsmith at ADDOMAIN.COM>
or better yet
jsmith  --without specifying the domain name.

How can this be accomplished?

[Lachlan Simpson]

You are looking for the default_domain_suffix setting in the sssd stanza of /etc/sssd/sssd.conf

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/sssd-user-ids.html

Cheers
L.

thanks

________________________________
From: Sumit Bose <sbose at redhat.com<mailto:sbose at redhat.com>>
To: pgb205 <pgb205 at yahoo.com<mailto:pgb205 at yahoo.com>>
Cc: Freeipa-users <freeipa-users at redhat.com<mailto: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<mailto:sbose at redhat.com>>
> To: pgb205 <pgb205 at yahoo.com<mailto:pgb205 at yahoo.com>>
> Cc: Sumit Bose <sbose at redhat.com<mailto:sbose at redhat.com>>; Freeipa-users <freeipa-users at redhat.com<mailto: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<mailto:pgb205 at yahoo.com>>
> >  To: Sumit Bose <sbose at redhat.com<mailto: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<mailto: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<mailto:sbose at redhat.com>>
> >  To: pgb205 <pgb205 at yahoo.com<mailto:pgb205 at yahoo.com>>
> > Cc: Sumit Bose <sbose at redhat.com<mailto: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<mailto: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<mailto: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<mailto: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<mailto:sbose at redhat.com>>
> > >  To: pgb205 <pgb205 at yahoo.com<mailto:pgb205 at yahoo.com>>
> > > Cc: "Freeipa-users at redhat.com<mailto:Freeipa-users at redhat.com>" <Freeipa-users at redhat.com<mailto: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<mailto:user at AD_DOMAIN.COMI> can also do kinit
> admin at IPA_DOMAIN.COMssh<mailto:admin at IPA_DOMAIN.COMssh> admin at IPA_DOMAIN.COM<mailto:admin at IPA_DOMAIN.COM> also works
> > > > however, ssh user at AD_DOMAIN.COM<mailto:user at AD_DOMAIN.COM> or user at ad_domain.com<mailto: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<mailto: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<mailto: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 <http://freeipa.org/> for more info on the project
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
> >
>
>

This email (including any attachments or links) may contain 
confidential and/or legally privileged information and is 
intended only to be read or used by the addressee.  If you 
are not the intended addressee, any use, distribution, 
disclosure or copying of this email is strictly 
prohibited.  
Confidentiality and legal privilege attached to this email 
(including any attachments) are not waived or lost by 
reason of its mistaken delivery to you.
If you have received this email in error, please delete it 
and notify us immediately by telephone or email.  Peter 
MacCallum Cancer Centre provides no guarantee that this 
transmission is free of virus or that it has not been 
intercepted or altered and will not be liable for any delay 
in its receipt.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/freeipa-users/attachments/20160719/5b3c6959/attachment.htm>