New installation issue

Hello, I am new to the volumio. I have just installed the volumio OS on my Rpi 2. I have issues with connecting to the device for first setup. The Rpi 2 is connected with wired lan. I can discover the internal IP and I can ping it. But when I search the web interface to my browser it cannot be found. The same with the volumio App on my iPhone. What am I missing?