Sharing and updating an ACCESS database on the cloud

MALGhalayini What I do for my office is:

I have taken real IP (Public IP) from my internet service provider. I have installed MSSQL server to one of my Windows Server computer and assign that public IP to one of network interface so that MSSQL database can be accessed via that real IP. Now I have developed front-end database objects and liked those objects to MSSQL table through linked table. Now, my users can use that database from any where from office (I have 3 different location) as well as home. Obviously I have limit access who do not need to access the database from outside of office. You may think this model or SQL database hosted in cloud.