> > > > Ldapsearch does not look good:
> > > >   # ldapsearch -h foo-ad02.a.foo.com -Y GSSAPI -b OU=...
> > > >   SASL/GSSAPI authentication started
> > > >   ldap_sasl_interactive_bind_s: Local error (-2)
> > > >           additional info: SASL(-1): generic failure: GSSAPI Error: 
> > > > Unspecified GSS failure.  Minor code may provide more information 
> > > > (Cannot determine realm for numeric host address)
> > > > 
> > > > And this I guess comes back to the DNS records? Because in 
> > > > ad.example.com, both A and PTR look good, but if I lookup from 
> > > > foo-ad02.a.foo.com, I can only resolve the A record. It looks like that 
> > > > domain only has conditional forwarders for the forward zone, not 
> > > > reverse. 
> > > 
> > > OK, then I think this is the issue.  btw it help to add -N to the 
> > > ldapsearch options to tell libldap to not canonicalize the hostnames?
> > 
> > Yes, -N allowed me to query the other domain, when I used the myuser-ticket.
> 
> Interesting, I /thought/ that's what we did in SSSD as well..I'll check the 
> code again.
> 
> > Removing that, however, I get the same error as before. I'm not familiar 
> > with ldapsearch, but I tried using  -U 'MACHINE$@AD.EXAMPLE.COM' to make it 
> > use the machine ticket, but that didn't seem to work.
> 
> If you kinit with -k as shown above, then the acquired ticket should be used 
> automatically.
>
Ah, that did it! However, ldapsearch with this ticket gives the not found in 
database error:

SASL/GSSAPI authentication started
ldap_sasl_interactive_bind_s: Local error (-2)
        additional info: SASL(-1): generic failure: GSSAPI Error: Unspecified 
GSS failure.  Minor code may provide more information (Server not found in 
Kerberos database)

> > 
> > > 
> > > Would it help if you add a record to /etc/hosts?
> > > 
> > 
> > My hosts-file contains only this row:
> >   127.0.0.1  machine.ad.example.com machine localhost
> > 
> > Should that be enough, or do you mean some other row?
> 
> I meant to use the public IP for machine.ad.example.com

Added that, but it seemed to have no impact on the results of ldapsearch.
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