How do i set up an private server with limited remote acces

i am setting up my own little gaming server, but i need an way to acces it remotely without having to allow myself in everytime.
is there an program that allows me to do this( preferebly free)?
and if so where can i download it and how can i set it up?
thanks for teh help

Go to http://www.pablosoftwaresolutions.com/html/products.html and see what’s there.