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Description of problem:

Setting up a trust with "ipa trust-add" is failing with the error:

"ipa: ERROR: Insufficient access: CIFS server idm.example.com denied your credentials"

where idm.example.com is the IdM server. 


Version-Release number of selected component (if applicable):
samba-4.6.2-8.el7.x86_64

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

The following samba upstream ticket is related:

https://bugzilla.redhat.com/show_bug.cgi?id=1430759


The patches are part of samba since 4.6.0-3 though:

* Fri Mar 10 2017 Alexander Bokovoy <abokovoy> - 4.6.0-3
- Ensure we set realm when updating ccache in auth/credentials
- resolves: #1430759 - use GSSAPI gss_acquire_cred_from call for gssproxy support

Created attachment 1378823 [details]
01986348-httpd-error-log

Created attachment 1378824 [details]
01986348-krb5kdc-log

Created attachment 1378825 [details]
01986348-gssproxy-log

This bug was a combination of a wrong smb.conf and non-running sssd-nss service (missing services=nss from sssd.conf). Once configuration issues were fixed, everything started working.

We've got confirmation from all related customer cases that establishing trust works. Any of gssproxy-related issues were addressed by the gssproxy-specific erratas, thus closing this bug.

I'm closing it with CLOSED NOTABUG because after all, there was no bug in Samba on this issue, only misconfiguration.

I also opened a ticket upstream to prevent IPA restore on a server with incomplete package base: in a case of a full backup restore we have to ensure all required extra packages present before doing a restore that uses these features.

https://pagure.io/freeipa/issue/7630