It's a firmware update done by Bell who changed everything.
remote admin of the router is now on, that's why you can't access your website from your home IP. when you try to see your site , the stupid router understand it as if you are trying to get to Its administration page.
We all have the same problem.
maybe a solution for you here
»[Internet] Sagemcom 2864 port fowarding no longer working?!?!