CBR40 - denial of service attack

Netgear has set up a community forum specifically for the Orbi with Cable modem products. Most of the people who watch that forum are more likely to have experience with Orbi with Cable modem and know how to work it better than those of us who follow this "general Orbi" forum. Might be more likely to find someone who has a solution if the question is posted there:
https://community.netgear.com/t5/Orbi-with-Built-in-Cable-Modem/bd-p/en-home-orbi-cable

Thank you.