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2026年10月のDCパッチ適用後、LDAPサーバーは利用できなくなります

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環境

  • NetApp ONTAP 9
  • Microsoft Active Directory（AD）
  • LDAP（Lightweight Directory Access Protocol）
  • CIFS / SMB

問題

  • 2026年10月にドメイン コントローラのセキュリティパッチを展開した後、AD LDAPサーバーが利用不可とマークされ、CIFS認証の失敗が発生し始めました。
  • EMSアラート：
    • None of the LDAP servers configured for Vserver are currently accessible via the network for LDAP service type
    • secd:secd.conn.auth.failure:notice]: Vserver(svm1) could not authenticate over the network to server(dc1). Error: Invalid credentials (Service: LDAP (ActiveDirectory), Operation: SiteDiscovery).
  • SECD エラー：
    • AdditionalErrorMessage: 80090303: LdapErr: DSID-0C0906D1, comment: The GSSAPI target name does not match any LDAP SPN's registered for this server., data 0, v4f7c RESULT_ERROR_LDAPSERVER_INVALID_CREDENTIALS:7627 ldapSaslBindSpnego: LDAP Error (49): 'Invalid credentials'

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