[Freeipa-users] Cross Domain Trust

[Jakub Hrozek]

On Mon, Jan 18, 2016 at 06:02:43PM +0100, Lukas Slebodnik wrote:
> On (12/01/16 11:11), Lukas Slebodnik wrote:
> >On (12/01/16 08:25), Zoske, Fabian wrote:
> >>We recently upgraded our IPA-Server from CentOS 7.1 to CentOS 7.2. So far no differences.
> >>
> >Then please provide sssd logfiles (1.13.3) from client
> >and also log files from sssd on freeipa server (sssd on freeipa
> >server is used indirectly by extop plugin in 389-ds)
> >
> >Please provide log files from the same time when you reproduced an issue.
> >
> Thank you very much for log files.
> 
> Authentication on client failed Due to following error:
> (Thu Jan 14 12:58:36 2016) [[sssd[krb5_child[992]]]] [sss_child_krb5_trace_cb] (0x4000): [992] 1452772716.736098: Sending request (173 bytes) to EUROIMMUN.TEST (master)
> 
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [get_and_save_tgt] (0x0020): 1232: [-1765328230][Cannot find KDC for realm "EUROIMMUN.TEST"]
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [map_krb5_error] (0x0020): 1301: [-1765328230][Cannot find KDC for realm "EUROIMMUN.TEST"]
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [k5c_send_data] (0x0200): Received error code 1432158209
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [pack_response_packet] (0x2000): response packet size: [4]
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [k5c_send_data] (0x4000): Response sent.
> (Thu Jan 14 12:58:37 2016) [[sssd[krb5_child[992]]]] [main] (0x0400): krb5_child completed successfully
> 
> 
> Do you have defineded the realm "EUROIMMUN.TEST" in your krb5.conf?
> 
> It is possible that sssd wrote snippet to the directory
> /var/lib/sss/pubconf/krb5.include.d/
> but this directory is not included in krb5.conf.
> 
> $ grep includedir /etc/krb5.conf
> includedir /var/lib/sss/pubconf/krb5.include.d/
> 
> BTW you can test the same operation as sssd did from command line.
> 
> KRB5_TRACE=/dev/stderr kinit f.zoske at EUROIMMUN.TEST
> 
> or is this principal name an enterprise name?

IIRC this came up in a private conversation, too. In short, enterprise
principals are not supported in a IPA-AD trust scenario, but one can
work around that by using:
    subdomain_inherit = ldap_user_principal
    ldap_user_principal = nosuchattr
and thus tricking sssd into 'deriving' the UPN from the domain name.