Supported cipher suites by protocol
Restricting at edge
Restrict these connections at the following levels:
Matching on origin
If you would like to support the same cipher suites on your origin that Cloudflare supports at our edge, the nginx configuration below can be used. If you are terminating TLS on your origin using something other than nginx, please refer to that application’s documentation.
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;ssl_ecdh_curve X25519:P-256:P-384;ssl_ciphers '[ECDHE-ECDSA-AES128-GCM-SHA256|ECDHE-ECDSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256|ECDHE-RSA-CHACHA20-POLY1305]:ECDHE+AES128:RSA+AES128:ECDHE+AES256:RSA+AES256:ECDHE+3DES:RSA+3DES';ssl_prefer_server_ciphers on;
- Although TLS 1.3 uses the same cipher suite space as previous versions of TLS, TLS 1.3 cipher suites are defined differently, only specifying the symmetric ciphers, and cannot be used for TLS 1.2. Similarly, TLS 1.2 and lower cipher suites cannot be used with TLS 1.3 (IETF TLS 1.3 draft 21). BoringSSL also hard-codes cipher preferences in this order for TLS 1.3.