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LDAP Server Authentication with NTLM for SSO - Totara v1.1.3

Ben Thomas
LDAP Server Authentication with NTLM for SSO - Totara v1.1.3
by Ben Thomas - Sunday, 10 February 2013, 9:22 PM

Hi all,

I apprecaite we're on an early version however I was wondering if anyone could shed some light on this issues we're experiencing when trying to set up LDAP authentication.

  1. Launched Totara URL and sighted “attempting single sign on via NTLM…”
  2. The browser ended up with “Auto login failed. Try the normal login page…” and then showed login page for manual login.
  3. Investigated the Apache logs and found the error message “gss_acquire_cred() failed: Unspecified GSS failure. Minor code may provide more information (, Unknown error), referer: _https://totaralmsurl.preprod/auth/ldap/ntlmsso_attempt.php”, however it didn’t give us any useful information on that.
  4. We have then checked DNS settings, scripts and permissions and all looks fine.

I appreciate there is not much info there but if anyone is able to steer me in the right direction that'd be great.  I need to liaise with our IT department so if there is any further information that might be helpful please let me know and I'll post it here.

Thanks for your assistance.