It means that the program has found the fact of infringement of the license.

For example, the registration code allows you to use the program only on two different computers. Earlier you were connected to these computers using the Admin Module and now you are trying to connect to another computer. In that case the program shows the message about infringement of the license. Also such message may appear when the license has not been violated, but some hardware on the remote PC was changed. In this case you must reenter the registration code in the Admin Module (Menu/Help/Enter registration code). After that you will be able to connect another remote PC.

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It happens because the current version of Remote Desktop Controlcannot work with full screen text modes. However you can press Alt+Enter combination to switch the remote computer to the windowed text mode.

Note: You can send keystrokes to the remote host, only if you are working with the remote computer in "Control Mode"

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Sometimes while viewing the remote screen, it may look ugly. It happens when you are using a color depth of 8 bit per pixel. In this case we recommend you to use the color depth of 16 bits per pixel or more. You can change the color depth in the system menu of the Remote Screen Window (press Ctrl+F12).

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In case of a poor performance of Remote Desktop Controlwhile viewing of the remote screen, it is recommended (in order from most effective remedy to less effective):

On the Host site:

• Use better video adapter (with many video memory) and latest video drivers.
• Reduce color depth and screen resolution.
• Remove wall-paper from the desktop.
• Use "Security Level 1" option in the Host Configurator settings (note: this is not recommend when the high security of network connections is required).

On the Admin Module:

• Use "auto" color depth in Remote Screen Window for LAN connections and "8 bit per pixel" for slow internet connections. Use the system menu (Ctrl+F12) to change Color Depth.

Also we recommend to use 100 Mb and more network adapters to improve network performance.

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Remote Desktop Controlis a secure remote control program. It has a large number of security features that can be used to defend PC from unauthorized remote access. Here are some reasons Remote Desktop Controlis completely safe:

Access to the remote computer is restricted by password. A challenge-response authentication of connections is provided for prevention of unauthorized access to computers with the working Remote Desktop ControlHost program (the program uses digital signature algorithm RSA with a private key of 320 bit length).

Remote Desktop Control works in encrypted mode. All data streams, including screenshots, keystrokes and mouse movement are encrypted by a symmetric, randomly generated key of 64 bit length that is given to the both sides during the process of authentication.

IP-Filtering feature allows an access to the Remote Desktop ControlHost only from specified IP addresses and subnets.

Master Key usage guarantees a safe storage of the Access Passwords for connection to the remote hosts on the computer with Remote Desktop ControlAdmin (it is used strong encryption with 256-bit key).

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The technical and customer support are managed by our R&D Department in Ukraine (GMT+2 Time Zone). Please be patient if there is some time difference with your current location.

For any technical questions, bug reports, comments or request please contact us via web form.

When contacting support team please specify:

• Remote Desktop Controlversion and Windows version on the Admin and Host PCs.
• The problem you faced and all other information that you think is related to the problem.
• If you have problems with connection, please describe your network environment:
  Where host and admin PCs are located (in the LAN or Internet), which type of IP addresses they have (private or public). Describe intermediate points located between PCs, such as proxys, routers, firewalls, etc.

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At the first, you should download the newest version of software from our web site:
www.remote-desktop-control.us

After that you can install a new version of Remote Desktop Control on your computers.

If you want to update Remote Desktop Controlon a different computer(s) in your LAN, the computer has to have an access to the installation package (via LAN for example). In this case you will be able to update Remote Desktop Controlon each PC separately by launching the installation program.

You will receive notifications about updates automatically, if you are a subscriber of our mail list or a registered user.

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You can send Ctrl+Alt+Del combination to the remote computer in "Control Mode" only. Also the Host Module must run as a system service on that remote PC. Press Ctrl+Alt+F12 or call the system menu of the Remote Screen Window and choose menu item "Send Keystroke > Ctrl-Alt-Del".

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Run the Host Configurator program from the Programs menu. Select "Launching" page and then select the "Hide tray icon" option.

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Current version of Remote Desktop Control does not contain this feature, but we will include this feature into the new versions of Remote Desktop Control.

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A tray menu of the Host Module contains the "Exit" command to close the Host Module. Actually the user of remote computer should not be able to shutdown the Host Module, because the network administrator needs to have a stable access to the remote host at any time. It is recommended to hide the tray icon on each workstation. The administrator can do this using the Host Configurator program (see Launching tab).

The Host Configurator program also contains the "Close Host Module now" button, which allows you to close the Host Module when the tray icon is invisible. Therefore, you should protect this ability with password; see the Security tab of Host Configurator.

For Windows NT/2000/XP/2003:

If you are using the Host Module as a simple application, the computer user will be able to shutdown it using the Task Manager. You should use the Host Module as a system service if you want to avoid this issue. Only users with administrator's privileges will be able to stop the service through the Service Manager.

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Use F12 key for switching between "Full-Screen" and "Windowed" modes. if you want to send the F12 key to a remote PC, use 'Send Keystroke / F12' entry from the system menu of the Remote Screen Window.

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In the "Windowed" display mode look at the title of Remote Screen Window, you will see the remote computer's display name.

In the "Full-Screen" display mode, you should temporary switch to the "Windowed" mode (F12), and look at the title window.

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The address book is stored in the apc-addressBook.ini file in the work folder of Remote Desktop Control. You can simply copy this file to another computer.

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The reason can be different. For example:

• You have incorrectly entered a port number or IP-address/name of the remote Host
• The Host Module is not running on the remote PC.
• The remote computer is switched off or its network cable is disconnected.
• The firewall protection on the remote host is used.
• There is no direct TCP/IP connection with target computer (computers is located in different network for example).

You can test a connection to the remote computer using a Ping command in the system console: ping [remote_host]

Example:
  ping 10.0.0.1
  ping myserver.mycompany.com

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Every computer connected to the Internet or network is assigned a unique number known as an IP address. There are many ways to know the own IP address, we recommend following:

• Move your mouse pointer over the Host Module tray icon. The tool tip will show the list of IP addresses.
• Type ipconfig (winipcfg for Win95) command in the system console.

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At the first, you should know IP-address of the remote PC. Also you need to have an access to the remote PC via TCP/IP from your local network. For accessing the internet from local computers we recommend to use the server with two network interfaces: internal (local network) and external (Internet). Operation system of this server doesn't matter. There are many variants of server configuration:

1. The server works as a gateway, providing a shared Internet access to multiple PC's or other devices. In this case Remote Desktop Controlcan simply be connected to the remote host using the IP-address.
   
   If your server works under Windows2000/XP/2003, you can use ICS (Internet Connection Sharing) on your server for granting internet access to computers of your local network:
   www.microsoft.com/WindowsXP/pro/using/howto/networking/ics.asp
   
   
2. You can use NAT (Network Address Translation) on your server for granting internet access to computers in your local network.
   
   NAT is a program that converts the IP address from a private address to a public one real time. This allows multiple users to share a single public IP address. It also prevents access to these users from the outside without special configurations. NAT is used in home networks and corporations to allow multiple PCs to access the internet via T-1, ADSL, SDSL or Cable Modem.
   
   Read more...
   If your server runs under Windows 95/98/NT, we recommend you to use Kerio WinRoute as NAT software.
   
   
3. It is possible, when HTTP Proxy (for example Squid or WinRoute) is used for granting the internet access to computers located in your local network. The current version of Remote Desktop Controldoes not work through HTTP Proxy servers. This opportunity will appear only in the following versions of the program. However there is a way of connection to the remote computers through a HTTP Proxy. It is HTTP-tuneling.
   
   For realization of this opportunity you can use special software, for example: HTTPort or Socks2HTTP
   
   These programs allow you to bypass an HTTP proxy, which is blocking you from the Internet. With HTTPort you may use the following software from behind an HTTP proxy: Remote Desktop Control, IRC, ICQ, FTP, etc.

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Remote Desktop Controluses TCP port 6279 by default. You can open this port on the firewall. Another solution is to change the Remote Desktop Controlport number on both sides (for Host Module and Admin Module) to the value of a port that is already opened on your firewall. 80 or 21 for example.

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You can connect to the remote computer via Internet. The only problem might be the IP address on the Host Module side. It could be dynamically assigned; therefore you should find out it after the remote PC connection to the Internet. Someone on the remote side could tell you the remote IP address by phone or email for example. After that you connect to the remote computer using known IP address.

If you are often compelled to be connected to the remote computer with the dynamically assigned IP-address, and nobody on the remote side can tell you a current IP, you can use some of services, such as www.no-ip.com. It will help you to know the IP address of the remote Host even if it often changes.

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It is possible when computers are located in the internal network behind a NAT based router. In that case computers have no public IP addresses, i.e. addresses are private (192.168.x.x for example); and only a router has a public IP address (211.27.164.21 for example).

You need to configure "Forwarding" on the router/firewall to control internal network computers from the Internet. You should configure the router to forward connections from a port on the router to a specific IP address and port of the target computer in your internal network. It is necessary to assign unique port on the router for every computer you need to control.

Remote Desktop Controluses TCP port 6279 by default.

How "port forwarding" works? Terminology:

Port on the network PC is a private port. Network PC is private.

Port on the router is a public port. Router is public.

Router should forward traffic from its different public ports to different private computers

Let's consider an example:


You have local network with 3 PCs and 1 router. Admin Module is located anywhere in the Internet, but not in this network.

You want to control network PCs via Internet when you use the admin's PC.

For example public IP address of router is 211.27.164.21.

Private IP addresses of network PCs are: 192.168.1.10, 192.168.1.11, 192.168.1.12

In this case the configuration of the "port forwarding" can be the following:

211.27.164.21 : 6279 --> 192.168.1.11 : 6279

211.27.164.21 : 6278 --> 192.168.1.12 : 6279

211.27.164.21 : 6277 --> 192.168.1.10 : 6279

For connecting to some network PC via Admin Module you always use IP address of router (211.27.164.21), but unique port number (6277, 6278 or 6279). Host Module always uses port 6279.

In this example for connecting with 192.168.1.10 : 6279 you should enter in the admin address book:

IP address: 211.27.164.21

port: 6277

Note: In this example the port number in any Host Module's settings is always 6279, but not on the admin module's settings (Admin Module uses different port numbers to connect).

The next actions will take place if everything is configured correctly:

1. admin module will connect to a router (211.27.164.21 : 6277)
2. router will automatically forward all traffic to target machine (192.168.1.10 : 6279)

In such way you can control machine which is located in the closed private LAN via Internet.

If you do not have hardware router you can use a computer with access to the internet as a router: you have to set up PAT (Port Address Translation) on this PC. We recommend you to use such software, as hhproxy for configuring address translation. hhproxy is a proxy-server, designed to connect your entire LAN to the internet using a single RAS-Dialup-Connection or a direct Internet Link (firewall-machine). hhproxy is running under Win9x and WinNT server or workstation. hhproxy has no user-limit or time-limit. You can use this link for downloading it from our site: http://remote-desktop-control.us/3rd-party/hhproxy_rel.exe.

Installation of hhproxy is a very simple: create folder, and unzip all files from archive to it.
After that you must configure software. Create a file 'hhproxy.cfg' at the program directory. Open it with notepad and write the following lines (for the situation described above):

LogLevel 0
TcpMap 6279 120 211.27.164.21 192.168.1.11 6279 0 0
TcpMap 6278 120 211.27.164.21 192.168.1.12 6279 0 0
TcpMap 6277 120 211.27.164.21 192.168.1.10 6279 0 0

Format of TcpMap directive is: -
TcpMap {LocalPort}{Timeout}{Bind-Address}{Target-Address}
{Target-Port}{Online-Mode}{SecurityFilter}

(For more detailed information address to a file 'readme.txt')

If you are using Win9x, you must create a shortcut to hhproxy in your startup group.
Under WinNT please run hhproxy.exe with parameter '/INSTALL' and restart computer. After that hhproxy will be registered as system service.

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You should to configure a Dial-Up networking on both sides and configure server to use TCP/IP.

• For Win9x: You need to install the Dial-Up networking server. This is a standard component since Windows 98.
• For WinNT: You should install the RAS.

After making a call using a Dial-Up networking you will be able to connect to the remote Host via IP address.

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If you want to use a program on N different computers, you need N single licenses (Single license authorizes the use of the software on a single computer. A client part, a server part, or both parts simultaneously). Minimal quantity of licenses you can purchase is 2. If you are our customer already, you can purchase additional licenses (please contact our sales department) - we will send you new registration key for summary quantity of PCs. How many licenses do you need? It depends on the way you are going to use Remote Desktop Control and whether you are planning to control administrator's PC remotely. There are 2 ways to use licenses:

1. Controlling any PCs from any place in the network. For example, you have local network with 4 PCs and you want to have fast remote access to any PC from any place in the network. In this case you should install Remote Desktop Control(both Modules) on each computer among these 4 PCs. You need registration key for 4 licenses. You should enter this key in Admin Module on each computer. After that you will be able to add 4 different PCs to the Admin Module's address book on each computer and you will have quick remote access to any PC from any place in the network.
2. Controlling any PC from your computer only. For example, you provide help desk support and you want to have remote access to 4 PCs of your customers. In this case your customers should install Host Module of Remote Desktop Control on their computers. To use Host Module only, it is not necessary for your customers to register program. Registration is required for your PC only. You should have 4 single licenses. You will be able to add 4 different PCs to the Admin Module's address book on your PC and you will have remote access to them. Note: Each license is used to control some physically unique computer. So you can't control many computers via 1 shortcut in Amin address book by changing the shortcut properties, since the Admin Module remembers computers it has been connected to.

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You can purchase the program on-line via the software registration service by credit card, bank transfer or check. Please visit the registration page on our site: DGTSoft to purchase the registration key. It costs only $25 for per computer. There are some sale propositions and discounts for multi-licenses.

Note: The price may change.

After purchasing you will receive an e-mail with registration key and instructions.

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After purchasing you will receive an e-mail with registration key for required quantity of licenses. This key should be activated on those computers, for which the licenses was brought.

You can activate the registration key in two ways:

1. The registration e-mail has a apc_key.bin file in the attachment. Copy this file in a folder where the Admin Module has been installed.
   
   This way is suitable for registrating the program in large networks: you can register it on each computer remotely, without leaving your workplace. The only one obligatory condition must be observancing for remote registration: Remote Desktop Control's program folder should be shared with full access privileges on each PC.
   
   
2. Run Remote Desktop ControlAdmin Module. Click on the "Enter Registeration Code" item in the main menu. A key input form will appear. The registration key is too long, so don't try to type it manually. Use a clipboard to copy (Ctrl+C) and paste (Ctrl+V) the key.

At last, restart the Admin Module. If all steps are done right, the shareware reminder will not appear anymore and the registration information will be shown in the About dialog.

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Contact our customer service using contact form and specify your registration data (Name, email, and so on). You will receive a new code via e-mail.

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