hi, We use turnstile captcha feature, and We have “Zero trust network” implemented and only known websites and ports are allowed. Though we have already allowed [Preformatted text](http://challenges.cloudflare.com) & cloudflare.com, but still, we face below error. HTTPS handshake to challenges.cloudflare.com failed. System.IO.IOException Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. An existing connection was forcibly closed by the remote host.
Any idea, what else do we need to allow on firewall to make it work?
1 Like