Drop support for insecure protocols

Author: A5hleyRich

global/server/ssl.conf

@@ -2,10 +2,11 @@
 # and recommend further improvements.
 
 # Don't use outdated SSLv3 protocol. Protects against BEAST and POODLE attacks.
-ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
+ssl_protocols TLSv1.2;
 
 # Use secure ciphers
-ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
+ssl_ciphers EECDH+CHACHA20:EECDH+AES;
+ssl_ecdh_curve X25519:prime256v1:secp521r1:secp384r1;
 ssl_prefer_server_ciphers on;
 
 # Define the size of the SSL session cache in MBs.
@@ -17,7 +18,3 @@ ssl_session_timeout 1h;
 # Use HTTPS exclusively for 1 year, uncomment one. Second line applies to subdomains.
 add_header Strict-Transport-Security "max-age=31536000;";
 # add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";
-
-# The default key used by DHE is weak and it's recommended to use a 2048 bit key.
-# Uncomment this line if you have generated a custom key using `cd /etc/ssl/; sudo openssl dhparam -out dhparams.pem 2048`
-# ssl_dhparam /etc/ssl/dhparams.pem;