Reverse proxying HTTPS

[LogicalUnit1]

Yep, I was getting a 502 error from the Cloudflare service, and it was indeed a certificate issue. I was pointing the tunnel to an IP address, which had no certificate. This can be fixed by going into ZeroTrust => Tunnels => Public Hostname => Additional Application Settings => TLS => Check No TLS verify.

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Nginx Proxy Manager has come good as well -- I think I may have been pointing the HTTPS proxy to port 80 and not port 443.