Webserver/setup optimizations (#220)

* Webserver security

* Create vHost dirs during install; link vHost to sites-enabled

* Remove default vHosts during install

* Only generate new DH params when also using real certificates

* Removed duplicate ssl_ecdh_curve

deploy/local_install/dhparams.pem

@@ -0,0 +1,13 @@
+-----BEGIN DH PARAMETERS-----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=
+-----END DH PARAMETERS-----

deploy/local_install/mediacms.io

@@ -46,6 +46,12 @@ server {
 
     ssl_certificate_key  /etc/letsencrypt/live/localhost/privkey.pem;
     ssl_certificate  /etc/letsencrypt/live/localhost/fullchain.pem;
+    ssl_dhparam /etc/nginx/dhparams/dhparams.pem;
+
+    ssl_protocols TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
+    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_ecdh_curve secp521r1:secp384r1;
+    ssl_prefer_server_ciphers on;
 
     gzip on;
     access_log /var/log/nginx/mediacms.io.access.log;

deploy/local_install/nginx.conf

@@ -19,10 +19,7 @@ http {
 
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
-
-    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
-    ssl_prefer_server_ciphers on;
-
+    
     access_log /var/log/nginx/access.log;
     error_log /var/log/nginx/error.log;
 

install.sh

@@ -93,10 +93,16 @@ cp deploy/local_install/mediacms.service /etc/systemd/system/mediacms.service &&
 
 mkdir -p /etc/letsencrypt/live/mediacms.io/
 mkdir -p /etc/letsencrypt/live/$FRONTEND_HOST
+mkdir -p /etc/nginx/sites-enabled
+mkdir -p /etc/nginx/sites-available
+mkdir -p /etc/nginx/dhparams/
+rm -rf /etc/nginx/conf.d/default.conf
+rm -rf /etc/nginx/sites-enabled/default
 cp deploy/local_install/mediacms.io_fullchain.pem /etc/letsencrypt/live/$FRONTEND_HOST/fullchain.pem
 cp deploy/local_install/mediacms.io_privkey.pem /etc/letsencrypt/live/$FRONTEND_HOST/privkey.pem
-cp deploy/local_install/mediacms.io /etc/nginx/sites-available/default
-cp deploy/local_install/mediacms.io /etc/nginx/sites-enabled/default
+cp deploy/local_install/dhparams.pem /etc/nginx/dhparams/dhparams.pem
+cp deploy/local_install/mediacms.io /etc/nginx/sites-available/mediacms.io
+ln -s /etc/nginx/sites-available/mediacms.io /etc/nginx/sites-enabled/mediacms.io
 cp deploy/local_install/uwsgi_params /etc/nginx/sites-enabled/uwsgi_params
 cp deploy/local_install/nginx.conf /etc/nginx/
 systemctl stop nginx
@@ -115,6 +121,14 @@ else
     echo "will not call certbot utility to update ssl certificate for url 'localhost', using default ssl certificate"
 fi
 
+# Generate individual DH params
+if [ "$FRONTEND_HOST" != "localhost" ]; then
+    # Only generate new DH params when using "real" certificates.
+    openssl dhparam -out /etc/nginx/dhparams/dhparams.pem 4096
+    systemctl restart nginx
+else
+    echo "will not generate new DH params for url 'localhost', using default DH params"
+fi
 
 # Bento4 utility installation, for HLS