Need help

[TotallyLegal]

Hi i've recently started a private tekkit server with me and my friends. But it seems like every time they join they have to use my private computer ip and/or my hamachi ip. I just want to know how to make a server where they can connect to my public ip. I searched a lot of videos but they are no help. I am also on a mac. So can someone please respond and help me out? Thanks!

[Torezu]

You...don't really know how networking works, do you?

[TotallyLegal]

Sort of not a whole bunch though.