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A single alert may have one or several post-filters.

Data table registry for post-filters

All post-filters are registered in the devo.audit.alert.definition table at the time of creation, providing a comprehensive record of their settings. This table also registers post-filter deletion to cover their complete lifecycle for auditing purposes. Learn more about this here.

What permissions do I need?

To access the Alerts overview area to create post filters, as well as access the Post filters tab to manage them, you need at least the View level of the Triggered alerts permission and the Update status / priority permission (see a detailed descriptions of the alerts permissions herework with post-filters, you need one of the following permissions:

  • Triggered alerts (View): allows you to see existing post-filters, both in the list of triggered alerts and the post-filters tab, but you cannot create or delete them.

  • Triggered alerts (View) + Update status / priority: allows you to create and delete post-filters, but you cannot configure them to delete triggered alerts.

  • Triggered alerts (View): allows you to manage post-filters entirely (create, delete, and configure them to perform any action).

Additionally, you need to have alerts assigned with at least View access (see Assign resources to a role).

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Name

Enter a descriptive name for the post filter. It is recommended to give it a meaningful name that helps identifying its purpose.

10_Apply a filter for post-processing.png

Extra Data

This is where you specify the condition(s) that will activate the post filter.

Click Add to include a condition (you can add several). Then select a parameter in the first drop-down, an operator in the second, and write a value in the text field.

  • The options that appear in the first drop-down are those registered in the alert extradata, which depend on the query and the alert triggering method (the eventdate will always be available).

  • The options that appear in the second drop-down depend on the data type of the parameter selected (for example, the contains operator for text strings).

  • The text value will be automatically filled in with the value registered in the extradata for the selected parameter, but you can change it as desired.

    • When eventdate is used in the first field, this field will show a date picker when clicking it, making it easier for you to select a date and time. This date will be shown in local time here and in all the menus it appears afterwards, such as those to manage existing post-filters.

Action

Select the action you want to perform when the alert meets the criteria:

  • Change status - Select one from the list of possible statuses (Watched, Unread, Closed, False positive, and Suppressed).
    Example: you can suppress alerts that do not contain a specific key value, reducing the noise and giving you the opportunity to revisit them after those caused by a key value are dealt with.

  • Change priority - Select one from the list of possible priority levels (Very low, Low, Normal, High, Very high).
    Example: you can set alerts to High priority when a key value occurs (see more about priority here).

  • Change notify delivery method - Select a different delivery method for the alert. This will suppress the assigned sending policy and notify the alert through the selected method immediately after being triggered. The options available in the dropdown are all existing delivery methods of any type.
    Example: you can change the delivery method for a more synchronous one (such as slack) when an alert’s threshold is exceeded by a critical amount.

  • Delete - Do not distribute the alert and remove it from the alert history.
    Example: you can delete alerts triggered by a specific value that is known to be harmless.

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Click the ellipsis menu that appears at the end of the row and select:

  • Stop: when the filter is active, the menu shows this option to deactivate it.

    • Run: when the filter is inactive, the menu shows this option to activate it again.

  • Delete: this option removes the filter permanently.

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