its called remote access.
To use Remote Desktop
With Remote Desktop, you can connect to your work computer from home and access all of your programs, files, and network resources as though you were actually sitting in front of your computer at work.
You need three things to create a remote location:
1.
Microsoft Windows XP Professional must be installed on the computer containing the files and programs that you want to access from a remote computer. The computer must also be part of a corporate network in which Remote Desktop connections are permitted. This computer is known as the
host.
2.
The remote computer must be running Windows 95 or later. This computer must also have the Remote Desktop Connection client software installed. The remote computer is known as the
client.
3.
Both computers must be connected to the Internet through a VPN connection.
Note: If you're not connecting to the host computer through a VPN, you'll need to use the actual IP address of the host computer instead of the computer name.
To set up the Remote Desktop, start with the host computer, which in this example is your work computer.
1.
Verify that you are signed in as the administrator.
2.
Click
Start, click
Control Panel, and then click
Performance and Maintenance.

3.
Click
System.

4.
Click the
Remote tab, select the
Allow users to connect remotely to this computer check box, and then click
OK.
Next, make sure you have Windows Firewall set up to allow exceptions.
1.
In the Control Panel, click
Security Center.

2.
Under
Manage security settings for, click
Windows Firewall.

3.
Make sure the
Don't allow exceptions check box is not selected.

4.
Click the
Exceptions tab, and verify that the
Remote Desktop check box is selected.

5.
Click
OK, and then close the Windows Security Center window.
Your host computer is now set up to allow remote access.
You will need the name of the host computer.
6.
In Control Panel, click
Performance and Maintenance, click
System, and then click the
Computer Name tab.

7.
Write down the full computer name, and then click
OK.
8.
Close Control Panel.
9.
Leave this computer running, locked, and connected to the corporate network with Internet access.
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Connect your remote computer to the host computer
To connect your home computer, which is the client (or remote) computer to your work (or host) computer, follow these steps:
1.
On your home computer, click
Start, point to
All Programs, and then point to
Accessories.
2.
In the
Accessories menu, point to
Communications, and then click
Remote Desktop Connection.
3.
In the
Computer box, type the computer name of your host computer, which you wrote down earlier.

4.
Click
Connect.
5.
When the
Log On to Windows dialog box appears, type your user name, password, and domain (if required), and then click
OK.
The Remote Desktop window opens, and you see the desktop settings, files, and programs that are on your host computer, which in this example is your work computer. Your host computer remains locked, and nobody can access it without a password. In addition, no one will be able to see the work you are doing remotely.
To end your Remote Desktop session:
1.
Click
Start, and then click
Log Off at the bottom of the
Start menu.
2.
When prompted, click
Log Off.
With the Remote Desktop Web Connection, you can start a remote desktop connection from your Web browser. To do so, point your browser to a server that is configured with Remote Desktop Web Connection, download an ActiveX control, and then connect to a Windows XP-based server with Remote Desktop. Client computers may also connect to a Microsoft Windows 2000-based server or to a server that is running Microsoft Windows NT 4.0 Terminal Server Edition.
To turn on the Remote Desktop Web Connection, follow these steps: 1.Click
Start, and then click
Control Panel.2.Double-click
Add/Remove Programs.3.Click
Add/Remove Windows Components.4.Click
Internet Information Services, and then click
Details.5.Click
World Wide Web Service, and then click
Details.6.Select the
Remote Desktop Web Connection check box, and then click
OK.7.Click
OK on the
Internet Information Services screen.8.Click
Next on the
Windows Components Wizard screen.
Note If you cannot connect to the remote computer after you follow these earlier steps, make sure that Remote Desktop is turned on. To do this, follow these steps: 1.Right-click the
My Computer icon on the desktop, and then click
Properties.2.Click the
Remote tab.3.Make sure that the
Allow users to connect remotely to this computer check box is selected, and then click
OK.4.Try to connect to the remote computer again.The files should now be installed. To start the Remote Desktop Web Connection, type the following URL in a client computer's Internet browser, where servername is the name of your server:
http://servername/tsweb
Note When you upgrade Windows XP, the Remote Desktop Web Connection Control is not updated. To update it, follow these steps: 1.Click
Start, click
Control Panel, and then click
Add or Remove Programs.2.Click
Add/Remove Windows Components.3.Click
Details.4.Select the
World Wide Web Service check box, click
Details, then click the
Remote Desktop Connection check box.5.Click
OK.
The latest version appears.