title: How to accept traffic from cloudflare only for cloud run via Reverse Proxy
body: <p>How can we make sure all requests are routed through cloudflare seevers only?</p>
  <p>I currently setup dns in cloudflare in proxy mode. I set a custom domain mapping on cloud run and pointed dns records for my custom domain to ghs.googlehost.com.</p>
  <p>Wondering how to make sure the traffic is received only from cloudflare to avoid abuses.</p>
  <p><strong>Update</strong></p>
  <p>There is another question about origin pulls but the answer mentions its only possible through OAuth which is not in detail.</p>