How can I access my Microsoft SQL Server 2000 through internet?

For example, I set up a Microsoft SQL Server in one of computers of my company, and every computer in my company has its own IP .They are in the same workgroup. Now, there is no problem with database access with another computer in my company. But when I try to access the database through a computer out of my company, I failed.

Can ou tell my how to access it through a computer out of my company?

Thanks