I'm trying to send a GET request to port 69 instead of 80, using the Arduino's Ciao library.
In the official documentation, found at http://www.arduino.org/learning/reference/ciao-rest, no one talks about requesting a port different than 80. Actually, it doesn't mention the word port, so... bad news there.
By the way, it seems that Ciao is the official way to work with the Arduino One Wifi, but if you know another way to do it, I will totally appreciate it.
You can configure the port in REST Server Connector.
See http://www.arduino.org/learning/reference/ciao-restserver.