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Origin server
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About
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Troubleshooting
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
ERR_TOO_MANY_REDIRECTS

Origin server

Learn more about SSL/TLS protection options for your origin servers:

Encryption modes: Encryption modes allow you to control how Cloudflare connects to your origin web server and how certificates presented by your origin are validated.
Cipher suites: Review a list of cipher suites that Cloudflare presents to origins during an SSL/TLS handshake.
Origin CA certificates: Origin Certificate Authority (CA) certificates allow you to encrypt traffic between Cloudflare and your origin web server, and reduce origin bandwidth consumption.
SSL/TLS Recommender: The SSL/TLS Recommender helps you choose which Encryption mode is best for your application.
Authenticated Origin Pulls: Authenticated Origin Pulls helps ensure requests to your origin server come from the Cloudflare network.
Custom Origin Trust Store: Custom Origin Trust Store allows you to upload certificate authorities (CAs) that Cloudflare will use to authenticate connections to your origin server.