How to mount a kerberized SMB/CIFS share?

Solution Verified - Updated -

Issue

  • A SMB/CIFS share needs to be mounted with Kerberos security instead of NTLMSSP.
    • Attempting to mount the share with sec=krb5 security fails with mount error(126): Required key not available
  • The service account exists, but a keytab for the user needs to be created.
  • The kinit command has to be run prior to mounting the share, instead of a ticket being dynamically acquired at mount time.

Environment

  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • Directory Service (IdM/FreeIPA/AD)
  • SMB/CIFS
  • Kerberos

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