common-server.conf

# There's a proxy in front of us; trust it and get its forwarded real IP    
real_ip_header X-Forwarded-For;
set_real_ip_from 10.0.0.0/8;

error_page  404              /404.html;
    
error_page   500 502 503 504  /50x.html;

location = /50x.html {
    root   /usr/share/nginx/html;
}

# 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
# also https://hstspreload.org/
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";
    
# 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";

add_header Referrer-Policy "strict-origin-when-cross-origin";

# Hide the server version from the headers
server_tokens off;

# Add Expect-CT header
# See https://scotthelme.co.uk/a-new-security-header-expect-ct/
add_header Expect-CT enforce,max-age=2629743,report-uri="https://sqroot.report-uri.com/r/d/ct/enforce";

    
# Frustrate WordPress scanner bots
location ~ ^/(wp-login|wp-admin|wp-config|wp-content|wp-includes|xmlrpc) {
    return 301 https://wordpress.com/wp-login.php;
}

# Disable reading of Apache .htaccess files
location ~ /\.ht {
    deny all;
}