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Cannot modify CIFS server's AD object because KRB5_KDC_UNREACH

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Category:
ontap-9
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NAS
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Applies to

  • ONTAP
  • CIFS
  • Active Directory
  • Kerberos

Issue

  • Active Directory was used to change the password of the CIFS server's machine account, instead of using an ONTAP CLI command like cifs password-reset
    • This causes the CIFS server's password stored in ONTAP and AD to become out of sync, preventing ONTAP from authenticating to AD, preventing CIFS clients from accessing files
  • When attempting to synchronize the password by using a cifs modify command to recreate the machine account, the creation of the new machine account succeeds, but the setting of the new password fails. 
    • ::> cifs modify -vserver svm1 -cifs-server svm01
5/30/2024 16:58:58  node-1 ERROR         secd.unexpectedFailure: Unexpected SecD failure in Vserver "svm1". Details: Error: Machine account creation procedure failed
[    11] Loaded the preliminary configuration.
[    72] Created a machine account in the domain
[    73] SID to name translations of Domain Users and Admins completed successfully
[    75] Modified account 'cn=one,OU=two,OU=three,DC=local'
[    76] Successfully connected to ip x.x.x.x, port 88 using TCP
[  2079] TCP connection to ip y.y.y.y, port 464 failed: Operation timed out.
[  6114] TCP connection to ip a.a.a.a, port 464 failed: Operation timed out.
[  8116] TCP connection to ip b.b.b.b, port 464 failed: Operation timed out.
**[ 34171] FAILURE: Kerberos password set for 'svm01$@domain.LOCAL' failed with Cannot contact any KDC for requested realm (KRB5_KDC_UNREACH)
[ 34171] Retry requested, but the retry window (7000 ms) has expired; giving up.

 

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