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7MTT: How to resolve a firewall issue when transitioning CIFS local users and group configurations

Applies to

7-Mode Transition Tool                

Description

Symptoms:

7-Mode Transition Tool (7MTT) reports the following blocking error when running a Precheck:

  • Error Code: 26000
  • Error Type: Blocking Error
  • Error Message: The HTTP port of the 7-Mode Transition Tool server is blocked by the firewall or HTTP port is not opened for target SVM data LIFs. Therefore, 7-Mode Transition Tool cannot transition 7-Mode local users and groups configurations to the following SVMs.
  • Corrective Action: Perform one of the following corrective actions and rerun the operation.
    Make sure that the specified HTTP port is not blocked by the firewall and the HTTP port is opened to the target SVM data LIFs.
    Ignore the transition of CIFS local users and groups configurations. Evaluate the impact before ignoring the transition of CIFS local users and groups. For more information about how to ignore the transition of CIFS local users and groups configurations, refer to the 7-Mode Transition Tool Guide.

Cause

The HTTP port (default - 8088) where the 7-Mode Transition Tool server is installed is blocked by the firewall. This port is required to be opened to transition CIFS local users and groups (LUG) from 7-Mode to the target SVM.

7MTT collects CIFS local users and groups from 7-Mode and stores the LUG information in a text file on the 7MTT server. During transition, the target cluster will read this text file from 7MTT to apply LUG configuration on the target SVM. Hence, if the 7MTT HTTP port is blocked, the target cluster will not be able to read the LUG text file, which will result in a failure of applying the LUG configuration on the target SVM.

Note: This precheck is implemented only from 3.0 or later versions of 7-Mode Transition Tool. However, the procedure to allow the HTTP port can be followed if transition of CIFS local users and groups fails during the transition.
Also refer Bug 952014: AutoSupport traffic disrupts when the storage system selects intercluster LIFs for outbound traffic

 

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