Redirect all HTTP traffic to HTTPS

server { listen 80; listen [::]:80; server_name www.domain.com domain.com; return 301 https://$host$request_uri; }

SSL configuration

server { listen 443 ssl http2; listen [::]:443 ssl http2; server_name www.domain.com domain.com; ssl_certificate /etc/letsencrypt/live/www.domain.com/fullchain.pem; ssl_certificate_key /etc/letsencrypt/live/www.domain.com/privkey.pem;

# Improve HTTPS performance with session resumption
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;

# Enable server-side protection against BEAST attacks
ssl_protocols TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384";
	
    # RFC-7919 recommended: https://wiki.mozilla.org/Security/Server_Side_TLS#ffdhe4096
    ssl_dhparam /etc/ssl/ffdhe4096.pem;
    ssl_ecdh_curve secp521r1:secp384r1;

# Aditional Security Headers
# ref: https://developer.mozilla.org/en-US/docs/Security/HTTP_Strict_Transport_Security
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";

# ref: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
add_header X-Frame-Options DENY always;

# ref: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
add_header X-Content-Type-Options nosniff always;

# ref: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection
add_header X-Xss-Protection "1; mode=block" always;

# Enable OCSP stapling 
# ref. http://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox
ssl_stapling on;
ssl_stapling_verify on;
ssl_trusted_certificate /etc/letsencrypt/live/www.domain.com/fullchain.pem;
resolver 1.1.1.1 1.0.0.1 [2606:4700:4700::1111] [2606:4700:4700::1001] valid=300s; # Cloudflare
resolver_timeout 5s;

Required for LE certificate enrollment using certbot

location '/.well-known/acme-challenge' { default_type "text/plain"; root /var/www/html; } location / { root /var/www/html; } }