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# https://wiki.mozilla.org/Security/Server_Side_TLS
# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=nginx-1.14.2&openssl=1.1.1c&hsts=yes&profile=intermediate
# certs sent to the client in SERVER HELLO are concatenated in ssl_certificate
# ~$ cat /etc/nginx/ssl/srvcert.pem /usr/share/lacme/lets-encrypt-x3-cross-signed.pem | sudo tee /etc/nginx/ssl/srvcert.chained.pem
ssl on;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
# Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
ssl_dhparam /etc/ssl/dhparams.pem;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384";
ssl_prefer_server_ciphers off;
# HSTS (ngx_http_headers_module is required) (31557600 seconds = 1 year)
add_header Strict-Transport-Security "max-age=31557600; includeSubDomains" always;
# OCSP Stapling: fetch OCSP records from URL in ssl_certificate and cache them
# https://github.com/jsha/ocsp-stapling-examples/blob/master/nginx.conf
ssl_stapling on;
ssl_stapling_verify on;
# verify chain of trust of OCSP response using Root CA and Intermediate certs
ssl_trusted_certificate /usr/share/lacme/lets-encrypt-x3-cross-signed.pem;
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