+<notextile>
+<pre><code> # Google API tokens required for OAuth2 login.
+ google_oauth2_client_id: <span class="userinput">"---YOUR---CLIENT---ID---HERE--"-</span>
+ google_oauth2_client_secret: <span class="userinput">"---YOUR---CLIENT---SECRET---HERE--"-</span></code></pre></notextile>
+
+h2(#start). Set up a Web server
+
+For best performance, we recommend you use Nginx as your Web server front-end, with a Passenger backend to serve the SSO server. To do that:
+
+<notextile>
+<ol>
+<li><a href="https://www.phusionpassenger.com/documentation/Users%20guide%20Nginx.html">Install Nginx and Phusion Passenger</a>.</li>
+
+<li><p>Edit the http section of your Nginx configuration to run the Passenger server, and act as a front-end for it. You might add a block like the following, adding SSL and logging parameters to taste:</p>
+
+<pre><code>server {
+ listen 127.0.0.1:8900;
+ server_name localhost-sso;
+
+ root <span class="userinput">/YOUR/PATH/TO/sso-devise-omniauth-provider/public</span>;
+ index index.html index.htm index.php;
+
+ passenger_enabled on;
+ # If you're using RVM, uncomment the line below.
+ #passenger_ruby /usr/local/rvm/wrappers/default/ruby;
+}
+
+upstream sso {
+ server 127.0.0.1:8900 fail_timeout=10s;
+}
+
+proxy_http_version 1.1;
+
+server {
+ listen <span class="userinput">[your public IP address]</span>:443 ssl;
+ server_name auth.<span class="userinput">your.domain</span>;
+
+ ssl on;
+ ssl_certificate <span class="userinput">/YOUR/PATH/TO/cert.pem</span>;
+ ssl_certificate_key <span class="userinput">/YOUR/PATH/TO/cert.key</span>;
+
+ index index.html index.htm index.php;
+
+ location / {
+ proxy_pass http://sso;
+ proxy_redirect off;
+ proxy_connect_timeout 90s;
+ proxy_read_timeout 300s;
+
+ proxy_set_header X-Forwarded-Proto https;
+ proxy_set_header Host $http_host;
+ proxy_set_header X-Real-IP $remote_addr;
+ proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+ }
+}
+</code></pre>
+</li>
+
+<li>Restart Nginx.</li>
+
+</ol>
+</notextile>
+
+{% include 'notebox_begin' %}
+
+If you see the following warning "you may safely ignore it":https://stackoverflow.com/questions/10374871/no-secret-option-provided-to-racksessioncookie-warning:
+
+<pre>
+SECURITY WARNING: No secret option provided to Rack::Session::Cookie.
+This poses a security threat. It is strongly recommended that you
+provide a secret to prevent exploits that may be possible from crafted
+cookies. This will not be supported in future versions of Rack, and
+future versions will even invalidate your existing user cookies.
+
+Called from: /var/lib/gems/2.1.0/gems/actionpack-3.2.8/lib/action_dispatch/middleware/session/abstract_store.rb:28:in `initialize'.
+</pre>
+
+{% include 'notebox_end' %}