Kentik has released a new Alerts reporting feature that lets you choose the type of Alerts (including DDoS) that you are interested in, along with the retention period (up to 90 days) and then either export this data or choose to schedule and subscribe to this report. 

This is version 1 of reporting for Alerts. This feature was suggested by our customers and provides initial reporting functionality around alerts. We plan to enhance this in future releases with more types of data, visualizations and analytics.

Example: I want to create a report of all my DDoS alerts (attacks) grouped by policies for the last 30 days.

Start by using the filter to apply the alert types, the retention period, summarization, grouping, etc. This is the main configuration of the report. Whatever you see here in the view is how the report will be created and viewed.

Then under the "Actions" drop-down in the upper right corner of the portal UI, you can choose to export this data directly or choose to set up a subscription to create a new report, say Monthly, and deliver it by email.

Fill out all of the desired subscription information and click "Subscribe"