It is so-called Remote control. There are lots of such applications such as VNC, MS termial service (RDC, remote desktop connection)and PC-anywhere.
The most generally being used is VNC and MS termial service. But unfortunately, It only works within LAN or the machine with a public IP address. Imaging what If you work at home or somewhere outside office where you are going to use remote control to some machines in office LAN? There are couple methods you can make it.
>By VPN (Virtual Private Network).But when you get your home computer connected, there may have security risk because your home computer may have office-banned softwares installed.
>Build a terminal service on one of machine in the office LAN; and on the router, forward the ports the terminal service using to the machine. In that way, the terminal server acts like a bridge. Computers outside the LAN get to the server first, and from the terminal server you can go any machines in the LAN..
>Use Remote control management tool, like Kaseya remote control. Most of remote control toos, such as VNC, MS terminal service, K-VNC,PAdmin and PC-anywhere, are integrated in the management tool. It is easier way to visit any machie agent installed over the world from wherever you have internet access. Anyone interested in it just contact me.
Alan Yang @ Iron Oak IT inc., Calgary, AB
ayang@ironoakit.com
http//www.ironoakit.com