[Freeipa-users] domain trust linux to AD server not finding user profiles

[Dmitri Pal]

On 10/07/2014 05:03 PM, Licause, Al (CSC AMS BCS - UNIX/Linux Network 
Support) wrote:
>
> I've been following the steps outlined in section 7.3.5 of the manual 
> entitled
>
> Integrating OpenShift Enterprise
>
> with Identity Management (IdM)
>
> in Red Hat Enterprise Linux
>
> OpenShift Enterprise 2.1
>
> IdM in Red Hat Enterprise Linux 7
>
> Windows Server 2012 - Active Directory Integration
>
> I now have our RHEL V7 running IdM, setup as an IdM Server in a 
> domain, Realm and subnet
>
> different from our existing AD server running Windows 2008 R2 with a 
> populated user database
>
> that can be queried using ldapsearch and can authorize users.
>
> I have successfully created a domain trust between the RHEL V7 Server
>
> (linux.ipa.cxo.cpqcorp.net 10.20.0.59/24) and the AD Server
>
> (win2008.osn.cxo.cpqcorp.net 16.112.240.55).
>
> To simplify the configuration I have no firewall running and so have 
> stopped both iptables
>
> and firewalld.
>
> All steps in section 7.3.5 have been followed.   But when I run the 
> first test for a user
>
> on the AD system, the system is unable to find anything:
>
> [root at linux ~]# getent group 'OSN\Domain Users'
>
> [root at linux ~]#
>
> [root at linux ~]#
>
> [root at linux ~]# getent passwd 'OSN\ldap25'
>
> [root at linux ~]#
>

The users and related information are not fetched until you authenticate 
as this user.
The ability to fetch users and groups that are not yet authenticated is 
tracked by the ticket https://fedorahosted.org/sssd/ticket/2159 and will 
be addressed in the next version of SSSD.
How frequently do you really need to lookup unauthenticated AD users and 
AD groups on linux systems? What is the use case?

The ticket above is for the cases when there is an application that 
needs to fetch the user so that admin of the application can assign 
privileges to this user. But this is a pretty corner case.

> I find this in the krb5kdc.log file:
>
> Oct 07 16:28:01 linux.ipa.cxo.cpqcorp.net krb5kdc[12908](info): AS_REQ 
> (6 etypes {18 17 16 23 25 26}) 10.20.0.59: NEEDED_PREAUTH: 
> host/linux.ipa.cxo.cpqcorp.net at IPA.CXO.CPQCORP.NET for 
> krbtgt/IPA.CXO.CPQCORP.NET at IPA.CXO.CPQCORP.NET, Additional 
> pre-authentication required
>
> Oct 07 16:28:01 linux.ipa.cxo.cpqcorp.net krb5kdc[12908](info): AS_REQ 
> (6 etypes {18 17 16 23 25 26}) 10.20.0.59: ISSUE: authtime 1412713681, 
> etypes {rep=18 tkt=18 ses=18}, 
> host/linux.ipa.cxo.cpqcorp.net at IPA.CXO.CPQCORP.NET for 
> krbtgt/IPA.CXO.CPQCORP.NET at IPA.CXO.CPQCORP.NET
>
> Oct 07 16:28:01 linux.ipa.cxo.cpqcorp.net krb5kdc[12908](info): 
> TGS_REQ (6 etypes {18 17 16 23 25 26}) 10.20.0.59: ISSUE: authtime 
> 1412713681, etypes {rep=18 tkt=18 ses=18}, 
> host/linux.ipa.cxo.cpqcorp.net at IPA.CXO.CPQCORP.NET for 
> ldap/linux.ipa.cxo.cpqcorp.net at IPA.CXO.CPQCORP.NET
>
> Oct 07 16:28:01 linux.ipa.cxo.cpqcorp.net krb5kdc[12908](info): 
> closing down fd 11
>
> I'm not quite sure what else I'm missing or have not understood in 
> order to query the
>
> AD server from the linux IdM server...but it would appear that 
> something is not correctly
>
> defined in the krb5.conf file found below:
>
> [root at linux ~]# cat /etc/krb5.conf
>
> includedir /var/lib/sss/pubconf/krb5.include.d/
>
> [logging]
>
> default = FILE:/var/log/krb5libs.log
>
> kdc = FILE:/var/log/krb5kdc.log
>
> admin_server = FILE:/var/log/kadmind.log
>
> [libdefaults]
>
> default_realm = IPA.CXO.CPQCORP.NET
>
> dns_lookup_realm = false
>
> dns_lookup_kdc = true
>
> rdns = false
>
> ticket_lifetime = 24h
>
> forwardable = yes
>
> default_ccache_name = KEYRING:persistent:%{uid}
>
> [realms]
>
> IPA.CXO.CPQCORP.NET = {
>
> kdc = linux.ipa.cxo.cpqcorp.net:88
>
> master_kdc = linux.ipa.cxo.cpqcorp.net:88
>
> admin_server = linux.ipa.cxo.cpqcorp.net:749
>
> default_domain = ipa.cxo.cpqcorp.net
>
> pkinit_anchors = FILE:/etc/ipa/ca.crt
>
> auth_to_local = 
> RULE:[1:$1@$0](^.*@OSN.CXO.CPQCORP.NET$)s/@OSN.CXO.CPQCORP.NET/@osn.cxo.cpqcorp.net/ 
> auth_to_local = DEFAULT
>
> }
>
> OSN.CXO.CPQCORP.NET = {
>
> kdc = win2008.osn.cxo.cpqcorp.net
>
> master_kdc = win2008.osn.cxo.cpqcorp.net
>
> admin_sever = win2008.osn.cxo.cpqcorp.net
>
> }
>
> [domain_realm]
>
> .ipa.cxo.cpqcorp.net = IPA.CXO.CPQCORP.NET
>
> ipa.cxo.cpqcorp.net = IPA.CXO.CPQCORP.NET
>
> .osn.cxo.cpqcorp.net = OSN.CXO.CPQCORP.NET
>
> osn.cxo.cpqcorp.net = OSN.CXO.CPQCORP.NET
>
> [dbmodules]
>
> IPA.CXO.CPQCORP.NET = {
>
> db_library = ipadb.so
>
> }
>
> Any help greatly appreciated.
>
> Al
>
> *Al Licause*
>
> *CSC Americas BCS Technical Specialist*
>
> *HP Customer Support Center*
>
> *Hours 5am-2pm Pacific time USA*
>
> *Manager: mark.bailey at hp.com*
>
>
>


-- 
Thank you,
Dmitri Pal

Sr. Engineering Manager IdM portfolio
Red Hat, Inc.

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