Connect an desktop application to my SQL Server using internet

I want to connect a desktop app to a SQL Server using internet, not local network. The app will run on every network in the world with internet and the data will retrieve and send from my PC using SQL Server... Do you know how I do that? I have forwarded the TCP 1433 ports in my DLINK router, and allow in the Windows Firewall, I have tried connect with my public IP into the SSMS but the server does not found. Only using my private IP given by my router 192.168.0.XXX.