We use Centrify Express on several production servers that are a bit dated. On our file server (CentOS 6.3, Centrify DC 5.0.4), Centrify has been working great for years. Yesterday, we rebooted the server to troubleshoot an issue with our backup server, and Centrify never bounced back.
Whenever a user attempts to access a Samba share, Centrify would crash and create crash dump files.
We've been troubleshooting non-stop for about 36 hours now, so describing everything we've done is probably useless, so here's where we are now:
1) We used yum remove CentrifyDC to uninstall Centrify (after doing the adleave command).
2) We used yum update to update the server to CentOS 6.9.
3) We reinstalled Samba and were able to verify that we could connect to local Samba shares with local accounts with Centrify removed.
4) We downloaded Centrify Suite 2017 (Centrify DC 5.4.2) and installed it using instructions.
5) We used the adjoin command to joint to our domain without errors. The adinfo command shows valid info for our domain controller.
5) We are still using stock Samba and our backed-up config for that.
At this point, our symptoms are:
1) We can't login to the server with domain credentials. It accepts the username and password, then reverts back to the login screen (yes, home directories exist with the correct permissions).
2) We can't login to the server with local credentials that are not root, but root is working correctly.
3) We cannot connect to Samba shares without getting "Access denied" errors, though permissions have not been changed.
4) We don't know how to test to ensure that Centrify is working correctly or not.
At this point, we're really uncertain as to how to proceed. Given that Samba shares work fine without Centrify installed, we believe that Samba is configured correctly and functioning. We believe that Centrify is not processing authentication correctly or that we have a misconfiguration somewhere, but don't know where to begin.
Any advice is good advice! Thanks in advance for the help.