PHP 5.6,xDebug,远程调试设置

Here's what I am trying to accomplish.

I have a remote server which has Xdebug, PHP-FPM (PHP 5.6), nginx, and has an external IP of x.x.x.x - I want to be able to connect to x.x.x.x:9000 from y.y.y.y for debugging purposes.

So, for this to happen, Xdebug has to listen on x.x.x.x - My question is how do I get Xdebug to bind to the x.x.x.x rather than localhost?

Here are the relevant portions of the xdebug.ini:

xdebug.remote_enable=1
xdebug.remote_port=9000
xdebug.remote_host=y.y.y.y
xdebug.remote_autostart = 1
xdebug.remote_connect_back = 0

I hope I am clear.