NGinx SSL Setup

2/16/2017 - 3:32 PM

# /var/ssl/ssl.conf
## Used in multiple SSL server blocks ##
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# enable session resumption to improve https performance
# http://vincent.bernat.im/en/blog/2011-ssl-session-reuse-rfc5077.html
ssl_session_cache shared:SSL:50m;
ssl_session_timeout 5m;

# Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
ssl_dhparam /etc/nginx/cert/dhparam.pem;

# enables server-side protection from BEAST attacks
# http://blog.ivanristic.com/2013/09/is-beast-still-a-threat.html
ssl_prefer_server_ciphers on;

# disable SSLv3(enabled by default since nginx 0.8.19) since it's less secure then TLS http://en.wikipedia.org/wiki/Secure_Sockets_Layer#SSL_3.0
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

# ciphers chosen for forward secrecy and compatibility
# http://blog.ivanristic.com/2013/08/configuring-apache-nginx-and-openssl-for-forward-secrecy.html
ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";

# enable ocsp stapling (mechanism by which a site can convey certificate revocation information to visitors in a privacy-preserving, scalable manner)
# http://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
resolver 8.8.8.8;
ssl_stapling on;

# config to enable HSTS(HTTP Strict Transport Security) https://developer.mozilla.org/en-US/docs/Security/HTTP_Strict_Transport_Security
# to avoid ssl stripping https://en.wikipedia.org/wiki/SSL_stripping#SSL_stripping
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

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site2.com

# /etc/nginx/sites-enabled/site2.com

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##    Server Setup For Site2.com        ##

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## Server options stored in nginx.conf  ##

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## Apex to SSL::WWW ##
## Redirects from site2.com -> https://www.site1.com (not necessary if you don't mind having multi access) ##
server {
  listen 80;
  listen [::]:80;

  listen 443;
  listen [::]:443;

  ## Details ##
  server_name site2.com;

  ## SSL ##
  include /app/ssl/ssl.conf;
  
  ## Certs ##
  ssl_certificate /var/ssl/site2/cert_chain.crt;
  ssl_certificate_key /var/ssl/site2/site2.com.key;

  ## Action ##
  return 301 https://www.$host$request_uri;
}

###################

## HTTPS ##
server {
  listen 443;
  listen [::]:443;

  ## Details ##
  ## Only accept WWW ##
  server_name www.site1.com;

  ## Root ##
  ## You can put index.html in the below folder ##
  root /var/www/site2.com;

  ## SSL ##
  include /var/ssl/ssl.conf;
  
  ## Certs ##
  ssl_certificate /var/ssl/site2/cert_chain.crt;
  ssl_certificate_key /var/ssl/site2/site2.com.key;

  ## Options ##
  location = /favicon.ico {
    access_log     off;
    log_not_found  off;
  }

}

##########################################
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site1.com

# /etc/nginx/sites-enabled/site1.com

##########################################
##########################################

##    Server Setup For Site1.com        ##

##########################################
##########################################

## Server options stored in nginx.conf  ##

##########################################
##########################################

## Apex to SSL::WWW ##
## Redirects from site1.com -> https://www.site1.com (not necessary if you don't mind having multi access) ##
server {
  listen 80;
  listen [::]:80;

  listen 443;
  listen [::]:443;

  ## Details ##
  server_name site1.com 13.12.11.10 [[ip_address]];

  ## SSL ##
  include /app/ssl/ssl.conf;
  
  ## Certs ##
  ssl_certificate /var/ssl/site1/cert_chain.crt;
  ssl_certificate_key /var/ssl/site1/site1.com.key;

  ## Action ##
  return 301 https://www.$host$request_uri;
}

###################

## HTTPS ##
## Only assign default to the virtual server you want No-SNI browsers to access ##
server {
  listen 443 default;
  listen [::]:443 default;

  ## Details ##
  ## Only accept WWW ##
  server_name www.site1.com;

  ## Root ##
  ## You can put index.html in the below folder ##
  root /var/www/site1.com;

  ## SSL ##
  include /app/ssl/ssl.conf;
  
  ## Certs ##
  ssl_certificate /var/ssl/site1/cert_chain.crt;
  ssl_certificate_key /var/ssl/site1/site1.com.key;

  ## Options ##
  location = /favicon.ico {
    access_log     off;
    log_not_found  off;
  }

}

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default

# /etc/nginx/sites-enabled/default

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##        General Server Setup          ##

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## General ##
## Ref: https://gist.github.com/plentz/6737338 ##

# don't send the nginx version number in error pages and Server header
server_tokens off;

# config to don't allow the browser to render the page inside an frame or iframe
# and avoid clickjacking http://en.wikipedia.org/wiki/Clickjacking
# if you need to allow [i]frames, you can use SAMEORIGIN or even set an uri with ALLOW-FROM uri
# https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options
add_header X-Frame-Options SAMEORIGIN;

# when serving user-supplied content, include a X-Content-Type-Options: nosniff header along with the Content-Type: header,
# to disable content-type sniffing on some browsers.
# https://www.owasp.org/index.php/List_of_useful_HTTP_headers
# currently suppoorted in IE > 8 http://blogs.msdn.com/b/ie/archive/2008/09/02/ie8-security-part-vi-beta-2-update.aspx
# http://msdn.microsoft.com/en-us/library/ie/gg622941(v=vs.85).aspx
# 'soon' on Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=471020
add_header X-Content-Type-Options nosniff;

# This header enables the Cross-site scripting (XSS) filter built into most recent web browsers.
# It's usually enabled by default anyway, so the role of this header is to re-enable the filter for
# this particular website if it was disabled by the user.
# https://www.owasp.org/index.php/List_of_useful_HTTP_headers
add_header X-XSS-Protection "1; mode=block";

# with Content Security Policy (CSP) enabled(and a browser that supports it(http://caniuse.com/#feat=contentsecuritypolicy),
# you can tell the browser that it can only download content from the domains you explicitly allow
# http://www.html5rocks.com/en/tutorials/security/content-security-policy/
# https://www.owasp.org/index.php/Content_Security_Policy
# I need to change our application code so we can increase security by disabling 'unsafe-inline' 'unsafe-eval'
# directives for css and js(if you have inline css or js, you will need to keep it too).
# more: http://www.html5rocks.com/en/tutorials/security/content-security-policy/#inline-code-considered-harmful
add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://ssl.google-analytics.com https://assets.zendesk.com https://connect.facebook.net; img-src 'self' https://ssl.google-analytics.com https://s-static.ak.facebook.com https://assets.zendesk.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://assets.zendesk.com; font-src 'self' https://themes.googleusercontent.com; frame-src https://assets.zendesk.com https://www.facebook.com https://s-static.ak.facebook.com https://tautt.zendesk.com; object-src 'none'";

# remove headers
more_clear_headers Server X-Powered-By X-Runtime;

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## Individual sites in respective files ##

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NGinx SSL Setup