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Will Changing DNS from A to Alias impact CIFS shares mapped by users using A record?

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • CIFS

Answer

  • When users access the share using the Alias name (previously A record for the LIF IP) after changing the ALIAS name of the LIF IP to the A Name, there will be no impact on NTLM authentication.
  • The share will still resolve to the same IP, ensuring a smooth experience without any issues.
  • To exclusively use Kerberos Authentication, ensure that the Service Principal Name (SPN) entry for the alias (previously the A record) is added to the CIFS machine account.
  • This can be done using the `setspn` command, which registers the SPN for the machine behind the alias. This step is crucial for enabling Kerberos authentication and ensuring proper network access.

Additional Information

How to set an SPN?

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