Add eleptic curves for intermediate profile preset
prime256v1 (NIST P-256), secp384r1 (NIST P-384) and secp521r1 (NIST P-521) have been deemed insecure as per Daniel J. Bernstein's research (https://cr.yp.to/newelliptic/nistecc-20160106.pdf, https://safecurves.cr.yp.to/). Despite that, the adoption of X25519 is too slim. Limiting to that curve would mean dropping compatibility with Safari, Edge and Internet Explorer.
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@ -18,4 +18,5 @@
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ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
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ssl_ciphers ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS;
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ssl_ecdh_curve X25519:prime256v1:secp384r1:secp521r1;
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ssl_prefer_server_ciphers on;
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