How to Deploy CDN and WAF?

Users need to resolve their domain name to CDN and then change the origin address of CDN to the CNAME value of WAF. Using this method, CDN forwards all the traffic to WAF, and then WAF filters the illegitimate traffic and routing the legitimate ones back to the origin server.

If one wishes to prevent other users from getting added to the domain name to WAF in advance, it is advised to add a subdomain name and a TXT record of WAF at the DNS provider.