Samba/Winbind can not authenticate to Windows AD when TLS is used to secure the connection

Solution Verified - Updated -

Issue

  • After enabling TLS in /etc/samba/smb.conf to secure the communication between Samba and AD, user authentication does not work anymore:
ldap ssl = start tls
ldap ssl ads = yes
  • [LDAP] res_errno: 53, res_error: , res_matched: <>

Environment

  • Red Hat Enterprise Linux
  • Samba packages that have been released after Badlock (April 12th 2016)

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