My hand through the LAN, intranet remote control Raiders

        The term "remote control" should be heard by everyone. On the network, a computer (master remote/client) can remotely control another computer (the host/server side of the host). >Technology
, remote control has many uses. You can sit at home and operate the office computer for remote office work. You can use remote control to help friends in different places solve computer problems. This is much more intuitive than using telephone.

There are a lot of remote control software, and Windows XP also comes with remote control. However, most of these softwares can only remotely control the hosted terminal with public IP. However, the IP of the public network is limited. The computers in the company and many broadband are generally intranets, that is, several computers share one through a gateway. Public network IP access, in this case to achieve remote control is more difficult, here are several feasible solutions, I hope to help the majority of intranet users.

First, use port mapping

1. Through XP remote desktop connection

Port mapping is the use of remote control software on the internal network computer That port is mapped to a port on the gateway, so that the computer of the intranet can be remotely controlled by using the public IP address of the gateway plus the mapped port number. Most routers and gateway software have port mapping function, and some port mapping software, such as WinRoute Pro, can be used. If it is shared by Windows XP, it also has port mapping function. Take the remote desktop that comes with Windows XP as an example to introduce its setting method.

Right click on the shared connection icon of the computer as the gateway, select "Properties", open the connection properties window, select "Advanced", then click "Settings", the dialog "Advanced Settings" will appear. Box (Figure 1).

Figure 1: Shared Link Advanced Settings

Note that there is a "Remote Desktop", check this box, a "Service Settings" window will pop up, where the port number and other settings have been Set up, we only need to add the internal network IP of the host (such as 192.168.1.3) (Figure 2), after two determinations, set the port mapping of the remote desktop.

Then enable remote control of the host, which is disabled by default. To do this, right-click on the "My Computer" icon, select "Properties", and select the "Remote" option in the "System Properties" window that pops up. Check "Allow remote invitation from this computer" and "Allow users to connect to this computer remotely", click "Select Remote User" to select the user with remote control (default administrator has control) for remote control Users must set a password.

When remote control is required, click “Start→All Programs→Accessories→Communication→Remote Desktop Connection” on the host computer to start the remote desktop connection; if the host is Windows 98 or other version Windows, you can put the XP installation CD into the CD-ROM drive, click "Execute other tasks → Set Remote Desktop Connection" on the auto-run interface to install the remote desktop connection program.

After starting the remote desktop connection, a window will appear (Figure 3). Here we need to input the public IP address of the gateway of the controlled terminal (such as 218.193.12.115, pay attention to the internal network IP of the controlled terminal) After the connection is successful, a window will appear. You need to enter the user name and password, and you can remotely control it in a while.

Figure 2: Server property settings

Figure 3: Far more than desktop connection login window

2. Home Edition XP remote assistance program

Home Edition Windows XP only has the function of remote assistance. In the "remote" option, there is only the option of "allow remote invitation from this computer". If the host is Windows XP Home Edition, you cannot use Remote Desktop Connection for remote control. , but you can use "remote assistance."

Figure 4: Help Center Interface

First, set the port mapping on the host according to the above method, then click “Start→All Programs→Remote Assistance” to open the remote assistance. (Figure 4), click "Invite someone to help you → save the invitation as a file (advanced)", enter the name and adjust the expiration time, then set the password, and finally save the invitation. The system will save the next file less than 1KB, which records the connection information, but the intranet user will not send it directly to the host. We will open it with Notepad, you can see that there is a record in it. Intranet IP (such as 192.168.1.3:3389) (Figure 5), change it to "Gateway IP: External Port Number" (such as 218.193.12.115:3398, 3389 is the default port number for Windows XP remote control), and save.

Figure 5: Remote Gateway Settings Interface

We need to send this file to the host by email or other means within the expiration time, and tell the password to him, the host opens the file. The remote assistance will be automatically started. After inputting the password, connect to the controlled terminal (as shown in Figure 6). After the connection is successful, a remote window will be requested for the remote control. Click “Yes” to agree to remote assistance. On the screen of the controlled terminal, if you want to control, click “Get Control”. At this time, the host will have a window request sharing control. Click “Yes” to agree to control, and also transfer files, etc., remote control. Finish, disconnect. Windows XP Professional can also be used for remote control in this way.

Figure 6: Remote connection prompt confirmation box

3. Port mapping through software

Other remote control software can also be used to implement port mapping. The following is widely used. The free remote control software Winvnc is an example to illustrate its setting method.

First set the port mapping, open the "Advanced Settings" dialog box in the shared connection as described above, Winvnc settings are not in the list, then click "Add", the "Service Settings" pops up Fill in the service description (such as Winvnc, you can just take it), and then fill in the internal IP of the host (such as 192.168.1.3), fill in the control port of Winvnc in the internal port number of this service (default is 5900), "The external port number of this service" is filled in the mapped port number (can be taken at random, it is recommended to be consistent with the internal port number), and the connection mode is selected as "TCP" (as shown in Figure 7), thus setting the port mapping. .

Figure 7: Server Port Settings Interface

Winvnc now has a Chinese version, Download
After installation, the opportunity to automatically start Winvnc, in the lower right corner of the taskbar will A small white VNC icon appears. Right click on the small icon. Select “Property (P)” and the setting window will appear (Figure 8). Fill in the “Password” with the verification password. If you select the "Enable Java Viewer (J)", then the host does not need to install Winvnc, you can directly use the Java-enabled browser to control, it is best to check the "remove desktop wallpaper" check, so You can increase the speed of remote control. Other settings can be used by default. After setting, press OK.

Figure 8: WinVNC option settings

PCD tool spectrum

Software name: WinVNC

Software version: 3.3.7 Chinese version

Authorization: Free Software

Software Size: 440KB

Download Address: http://down1.tech.sina.com.cn/download/downContent/2004-03- 16/3476.sHtml

During remote control, install Winvnc on the console and run the "VNC Viewer" in the Winvnc component. A "Connection Details" window will pop up (Figure 9) ), fill in the gateway IP of the controlled terminal at the "VNC server": external port number (such as 218.193.12.115: 5900, if the external port number is the same as the internal port number, it is also the control port of Winvnc, you can not fill in the external port number) Then click "OK" to start the connection. After the connection is successful, you will be asked to enter the password of the host, and then you can remotely control it. When remote control is performed, the VNC small icon in the status bar of the controlled terminal will turn black. When controlling, clicking the window for the upper left corner will open a menu (as shown in Figure 10), and select “Send Ctrl-Alt-Del” to open the control. The task manager of the end, select "connection options" to open a menu, adjust the connection options, check "Use 8-bit color" to increase the speed of control, remote control is completed, close the window to disconnect.

Figure 9: WinVNC connection server settings

Figure 10: WinCNC use interface

Other remote control software settings are similar, first set up port mapping, remote control At the time, the host uses the "gateway IP: external port number" to connect to the controlled terminal. I think everyone can definitely give the opposite. As for the setting method of the router and other gateway software, you can check the corresponding documentation, not to mention here.

The advantage of setting port mapping for remote control is that the main control terminal can directly establish a connection with the controlled terminal, and the remote control speed is fast. However, the limitations are also obvious: you need to have the operation authority of the gateway computer or router. As for how to open the network management or ISP open port mapping, everyone can find their own way, if they do not cooperate, it does not matter, then Take a look at the scenario below.

Second, the use of Winvnc reverse connection

Winvnc has a reverse connection function, that is, the host is actively connected to the host, after the connection is successful, the host Control, if the host has a public network IP, you can use the reverse connection for remote control.

To reverse the connection, the host must first run the "VNC Viewer Listening Mode" in the Winvnc component. When remote control is performed, the host clicks the right button on the VNC icon in the status bar. In the pop-up menu, select “Add New Client”, it will open a “Initialize Outbound Connection” window (as shown in Figure 11), and enter the IP of the host (which must be the public IP) in the “Host Name” field. After the connection is successful, the desktop wallpaper of the controlled terminal will be removed, and the small icon of the VNC in the status bar will turn black. At this time, the host can remotely control the controlled terminal, and the controlled terminal is in the status bar VNC. Right click on the small icon and select "Disconnect all clients" from the pop-up menu to disconnect and end remote control.