Add ssl_common.conf config

Author: macbre

ssl_common.conf

@@ -0,0 +1,17 @@
+# Grade A+ SSL support
+# https://ssl-config.mozilla.org/#server=nginx&version=1.17.9&config=intermediate&openssl=1.1.1d&guideline=5.4
+ssl_session_timeout 1d;
+ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
+ssl_session_tickets off;
+
+# curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam.pem
+ssl_dhparam /etc/ssl/dhparam.pem;
+
+# intermediate configuration
+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;
+
+# OCSP stapling
+ssl_stapling on;
+ssl_stapling_verify on;