Some HTTPS improvements to achieve A+ on Qualsys SSL Labs

[discourse_docker.git] / templates / web.ssl.template.yml

diff --git a/templates/web.ssl.template.yml b/templates/web.ssl.template.yml
index fd72cf293770bb5508fc0861b99d9e0e93980565..17cadad82e2ee003dc92a7e08fa4214ee5389ad9 100644 (file)
--- a/templates/web.ssl.template.yml
+++ b/templates/web.ssl.template.yml
@@ -3,7 +3,7 @@ run:
      cmd:
        # Generate strong Diffie-Hellman parameters
        - "mkdir -p /shared/ssl/"
-       - "[ ! -e /shared/ssl/dhparams.pem ] && openssl dhparam -out /shared/ssl/dhparams.pem 2048 || true"
+       - "[ -e /shared/ssl/dhparams.pem ] || openssl dhparam -out /shared/ssl/dhparams.pem 4096"
   - replace:
      filename: "/etc/nginx/conf.d/discourse.conf"
      from: /server.+{/
@@ -14,15 +14,14 @@ run:
        }
        server {
   - replace:
+     hook: ssl
      filename: "/etc/nginx/conf.d/discourse.conf"
      from: /listen 80;\s+gzip on;/m
      to: |
-       listen 443 ssl spdy;
-       spdy_keepalive_timeout 300; # up from 180 secs default
+       listen 443 ssl http2;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
-       # courtesy of https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_Ciphersuite
-       # removed RC4 due to ssllabs complaints
-       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:AES256:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK;
+       # courtesy of https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_configurations
+       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_prefer_server_ciphers on;
 
        ssl_certificate /shared/ssl/ssl.crt;
@@ -30,15 +29,10 @@ run:
        ssl_dhparam /shared/ssl/dhparams.pem;
 
        ssl_session_tickets off;
+       ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:1m;
 
-       # enable SPDY header compression
-       # The server CAN enable it without any known security risk:
-       # https://github.com/18F/tls-standards/issues/24
-       spdy_headers_comp 6;
-
-       # remember the certificate for a year and automatically connect to HTTPS for this domain
-       add_header Strict-Transport-Security 'max-age=31536000';
+       add_header Strict-Transport-Security 'max-age=31536000'; # remember the certificate for a year and automatically connect to HTTPS for this domain
 
        gzip on;