Can Cloudbric be used with other WAF services like Cloudflare/Imperva/Scutum?

If you are already using another WAF service, the configurations must be as follows:

[Client] - [Other WAF in use] - [Cloudbric] - [Web Server]

However in this case, you will be unable to use Cloudbric's free SSL, and depending on the WAF service's specifications, it may be difficult to use Cloudbric together.