GCP IAP can’t use at the same time ;; Cloud CDN overview | Google CloudCloud CDN (Content Delivery Network) uses Google's global edge network to serve content closer to users, which accelerates your websites and applications. Cloud CDN works with external HTTP(S) Load Balancing to deliver content to your users. The external HTTP(S) load balancer provides the frontend IP addresses and ports that receive requests and the backends that respond to the requests.https://cloud.google.com/cdn/docs/overview