Update reverse_proxy.md

reverse_proxy.md

@@ -1,2 +1,35 @@
 # Reverse proxy
 
+## Apache
+
+As XO-web and XO-server communicates with *WebSockets*, you need to have the `mod_proxy_wstunnel` in Apache (please [check the Apache documentation](http://httpd.apache.org/docs/2.4/mod/mod_proxy_wstunnel.html) about it). It's available for Apache 2.4.5 and later.
+
+
+Please use this configuration in this order or it will not work:
+
+```apache
+ProxyPass /[<path>]/api ws://<xo-server ip>:<xo-server port>/api
+ProxyPass /[<path>] http://<xo-server ip>:<xo-server port>/
+
+ProxyPassReverse /[<path>] /
+```
+
+
+## NGINX
+
+Just configure your VirtualHost as usual (or your default site), with a section `location` like this one:
+
+
+```nginx
+location /[<path>] {
+  proxy_pass http://<XOA ip address>[:<port>]/;
+
+  proxy_http_version 1.1;
+  proxy_set_header Connection "upgrade";
+  proxy_set_header Upgrade $http_upgrade;
+
+  proxy_redirect default;
+}
+```
+
+That's all!