| # version 2020 feb 24 | |
| ssl_certificate /etc/letsencrypt/live/yardomain.org/fullchain.pem; | |
| ssl_certificate_key /etc/letsencrypt/live/yardomain.org/privkey.pem; | |
| ssl_trusted_certificate /etc/letsencrypt/live/yardomain.org/chain.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; | |
| # generated using:# openssl dhparam -dsaparam -out /etc/ssl/dh4096.pem 4096 | |
| ssl_dhparam /etc/ssl/dh4096.pem; | |
| ssl_ecdh_curve secp384r1; | |
| ssl_stapling on; | |
| ssl_stapling_verify on; | |
| # I use local dnsmasq for faster lookups, highly recommend it! | |
| resolver 127.0.0.1 [::1] valid=4h; | |
| resolver_timeout 9s; | |
| ssl_session_timeout 1d; | |
| ssl_session_cache shared:MozSSL:18m; | |
| ssl_session_tickets off; | |
| ssl_buffer_size 4k; | |
| include /etc/nginx/headers; |
All this is with letsencrypt certs, generated using certbot..
Came across this looking for a good cipher list -
resolver 127.0.0.1 valid=300s ipv6=off;
is also an option if you don't have ipv6 support.
my include /etc/nginx/headers file contents;
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
add_header Referrer-Policy no-referrer-when-downgrade always;
# add_header Content-Security-Policy "default-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data:;" always;
add_header X-Frame-Options SAMEORIGIN always;
add_header X-Content-Type-Options nosniff always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Feature-Policy "accelerometer 'none';ambient-light-sensor 'none';autoplay 'none';camera 'none';encrypted-media 'none';fullscreen 'self';geolocation 'self';gyroscope 'none';magnetometer 'none';microphone 'none';midi 'none';payment 'self';picture-in-picture 'none';speaker 'self';sync-xhr 'none';usb 'none';vibrate 'none';vr 'none';";
See https://hstspreload.org/ for the stuff relating to HSTS preload.
Note that as soon as some nginx config (could be any snippet you use for a server) has a 'new' add_header entry, all previously set ones are gone. So, here's my pro tip:
Put an
include /etc/nginx/headers;
after every new header you've set, or at the bottom of your server/vhost conf file.
Then test if the headers are still sent using ssllabs, https://www.immuniweb.com/ssl/ and/or https://securityheaders.com/
don't use
add_header Content-Security-Policy "default-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data:;" always;
it ruins all iframes and/or embedded remote media.
Regarding the resolver entry: http://blog.zorinaq.com/nginx-resolver-vulns/
You can easily mitigate this (using dnsmasq, like I did, for example)..
Don't forget to add the ipv6 localhost, i.e. [::1]