Need Cloud9 workspace IP address to access Yii2's Gii

I am trying to access the Yii2 framework's auto code generator (Gii) and I need the IP address for the Cloud9 workspace server I am on. http://www.yiiframework.com/doc-2.0/guide-start-gii.html

I tried doing an "echo $IP" from the CLI and it gives me a 0.0.0.0 but that does not work. When I try to add it here: http://prntscr.com/8xvxax I get this "Forbidden 403" message: http://prntscr.com/8xvxz9

How do I get the correct IP address???

Solution

"Open whatismyip.com in your browser, it should give you the right address. If all else fails, you can temporarily try allowing all addresses to access gii (add "*" to the list)."

<<<<< This was the answer thanks to Beowulfenator