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Filtering

Filter incoming log data

Overview

Raw event filters allow you to filter your log data ingested into Panther, using regex expressions or substrings patterns. Filtering helps you realize the value of your high-volume logs and use logs that were previously cost-prohibitive when connected with Panther.

Types of raw event filters

There are currently two types of filters:
  • Regex filters: Events that match the regex expression will be dropped.
  • Substring filters: Events that include the pattern at least once will be dropped.
In a log event filter, an Exclusion Condition is shown. The filter reads, "Exclude if" and a select box is open, showing two options: "Matches Regex" and "Contains"

Creating a raw event filter

Filters are applied on raw events—not normalized data visible in the data lake, which can differ. Ensure you are constructing filters based on raw data. Basing filters on normalized data could cause false positives and unintentionally dropped data.
To create a raw event filter:
  1. 1.
    In the left-hand navigation bar of your Panther Console, click Configure > Log Sources.
  2. 2.
    Click the name of the log source you'd like to add a filter to.
  3. 3.
    Click the Filters tab.
  4. 4.
    Click New Filter.
    The "Filters" tab of an "Aurora logs" Log source is shown. There is an arrow drawn to a blue "New Filter" button.
    ​
  5. 5.
    Provide a value in the Add Filter name or short description field, then click the checkmark to the right of the field to save it.
  6. 6.
    In the Exclusion Condition section, click the + to the right of Exclude if.
    An "Exclusion Condition" is shown. There is an "Exclude if" statement, with a plus sign to its right. The plus sign is circled.
    ​
  7. 7.
    Click Condition, and select one of the options below. Learn more about the different ways to construct exclusion statements in Types of raw event filters.
    • Matches Regex
    • Contains
      In a log event filter, an Exclusion Condition is shown. The filter reads, "Exclude if" and a select box is open, showing two options: "Matches Regex" and "Contains"
      ​
  8. 8.
    If you used the Matches Regex condition, enter a regular expression. If you used the Contains condition, enter a string value.
  9. 9.
    In the Quick Test section, enter a raw event to test against the filter you just created.
    • You can click View raw data to see raw events received by the source. To the right of an event, click Test event to populate the Raw Event field in Quick Test with the event.
      A list of raw events is shown. Each row has a "Test event" button on the right-hand side. The "Test event" button in the first row is circled.
      ​
  10. 10.
    Click Run Test.
    • Notice whether the test event matches the exclusion pattern.
  11. 11.
    Click Save.

Enabling or disabling a raw event filter

To enable or disable a filter, by clicking on the toggle in the righthand side corner.
  1. 1.
    In the left-hand navigation bar of your Panther Console, click Configure > Log Sources.
  2. 2.
    Click the name of the log source you'd like to add a filter to.
  3. 3.
    Click the Filters tab.
  4. 4.
    On the right-hand side of the tile of the filter you would like to enable or disable, click the toggle next to Enabled.
    The "Filters" tab of a HTTP source is shown. To the right of the filter with the name "Filter non Json rows," the toggle next to "Enabled" is on.
    ​
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Last modified 9d ago