Remote Desktop to workstations not server
Im sure this is easy but I dont get how to do it...I have had many Remote Desktops to the my servers before via noip.com or dyndns and routing the connection to the server IP. However I have a school that Im not at very often and want to be able to remote in and choose which desktop/laptop to connect to so I can take over their screen and give remote assistance via the internet. Whenever I have set RDP up I have only managed to get the server desktop and not workstations in network, how do I route to the internal machines?
preferably using free or open source software....