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Understanding Probing Criteria Logic

When you configure a probe for an application in the Admin Portal, the inclusion and exclusion configuration fields use different logic based on what you select. You can create a combination of the inclusion and exclusion criteria to be specific towards your probing data needs.

Simple Probing Criteria

In the following scenarios, we are considering separate Probing and Exclusion Criteria and multiple items selection. These are helpful in analyzing a broader use case for a user, department, or location.

  • When you want to include criteria for a probe, the probe uses the AND logic.

    For example, you create a probe to include a user named John Doe in Group B and in the Finance Department.

    • User: John Doe
    • User Group: Group B
    • Department: Finance

    Expression: John Doe AND Group B AND Finance

    Close
  • When you want to exclude criteria for a probe, the probe uses the OR logic. The Exclusion Criteria avoids gathering probing data for the selected criteria. This helps avoid gathering data for non-impacted users.

    For example, you create a probe to exclude multiple users in Group C or in Finance.

    Exclusion Criteria:

    • User Group: Group C
    • Department: Finance

    Expression: NOT (Group C OR Finance)

    Close
  • You can select multiple items within the field criteria that uses the OR Logic. This is applicable to both the Probing and Exclusion Criteria. You can select multiple items to expand your selection criteria (e.g., multiple locations, user groups, departments).

    Probing Criteria

    Scenario: You want a probe for multiple locations and user groups.

    • Location:
      • San Jose
      • Los Angeles
    • User Group:
      • Group B
      • Group C

    Expression: (San Jose OR Los Angeles) AND (Group B OR Group C)

    Exclusion Criteria

    Scenario: You want a probe to exclude selected locations and departments.

    • Location:
      • Sacramento
      • San Francisco
    • Department:
      • Engineering
      • Finance

    Expression: NOT (Sacramento OR San Francisco) AND NOT (Engineering OR Finance)

    Close

Complex Probing Criteria Logic

You can combine the Probing Criteria and Exclusion Criteria for more specific cases.

The Exclusion Criteria is evaluated first and then the Probing Criteria.

For example, you create a probe to include a specific user groups in a location, but want to exclude specific departments or a location so that you can isolate to only users of interest.

  • Probing Criteria:
    • User Group: Group B
    • Location: California
  • Exclusion Criteria:
    • Department: Finance
    • Location: San Jose

Expression: NOT (Finance OR San Jose) AND (Group B AND California)

Using Criteria Effectively

In order to use criteria effectively, consider the following:

  • Using OR can expand your results.
  • Using AND reduces your results.
  • Combining inclusion and exclusion criteria decreases the amount of your probe results.

If you do not find any results, Zscaler recommends reducing the amount of criteria.

Related Articles
About ProbesConfiguring a ProbeEditing a ProbeUnderstanding Probing Criteria LogicUsing Adaptive ModeConfiguring Zscaler Hosted ProbesManaging Zscaler Hosted ProbesZscaler Hosted Probe Errors