Enabling IPAII protocol disable remote conections. Why? I have some servers with IPAII protocol enabled with a certain port:

I'm using 1433 because a long story. but its working. We can use the default port 1433 AND IPAII ( for PHP developers ) with 1433 too.
But in production, when I changed, the server lost connection.
There's no way to explain this in a easy way.
Why I had no problems on one servers, but on another, it lost connection?
If the question is to abroad, I can get it better.
After you modify any of these settings it's common to lose connections until you restart the instance (and sometimes Browser too if you're using it). We have a policy not to do it without an outage window.