Connecting to MySQL (on Google Cloud SQL) via JDBC and IPv6?

it helps some times Sigh...The solution was right in front of my face. I needed to grant the Google App Server IPs. Im sure you could add more code to connect over ssh and its more secure but this is fine for now.
Here are IP address range:

around this issue I figured this was a browser problem. The Google developer console on Mozilla was displaying the ip as updated although it was not updating it in the backend. I used Chrome to set this Access control in the Developer console and this worked fine.

This might help you First thing's last.. Do not use mysql_ instead use mysqli_ for all the reasons on this you can check this : Stackoverflow mysql_
Moving on from that, there is no reason you should think of connecting to a MySQL server any different just because of how its hosted. Cloud is a wonderfull Buzz word.. But its nothing new, its still just a host.

$host = "hostname // IP";
$user = "username";
$password = "password";
$datbase = "your_database";

Hope that helps Just like you connect IPv4-to-IPv4 addresses, you need to connect IPv6-to-IPv6 addresses. Your ISP needs to support IPv6 and issue you an IPv6 prefix from which your IPv6 addresses originate. If you have IPv6 Privacy Extensions enabled on your Macintosh, your source IPv6 address will periodically change, and that could be a problem for your connection. Don't try to use Link-Local IPv6 addresses (start with fe80:). You will need Global IPv6 addresses (start with 2xxx: or 3xxx:).