Hello Mike,
Thank you for reaching out! Both CSF and Imunify applications have similar DoS protection algorithms, which is why if Imunify360 detects CSF running on the server, we disable our protection. But in case you wish to use our DoS protection, you can disable CSF. Otherwise, the customer can easily use both services since those work fine in the integration mode and may deliver better protection to the server because of more flexible managing. Nevertheless, it depends on the client's preferences and habits to use CSF. You can find more details here:
https://docs.imunify360.com/ids_integration/#csf-integration
Please let us know if you have any questions. Thanks in advance!