This section of the site contains answers to the questions people frequently ask.
Important: this FAQ is always updated to match the latest version of ViewerX control.
If you are not up to date, you can
download the latest
version for free on this
page.
If you have further questions, please contact our customer
service department.
What are the differences between the Enterprise and the Standard editions?
Check comparison page that outlines features specific
to each edition.
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I'm getting "Connection refused" message when trying to establish a VNC connection. What's
wrong?
After careful debugging this problem we found out that this is not a bug in VNC
Manager. VNC server has a protection against brute-force password hacking attacks.
The server uses a time interval in order fight brute-force attacks and it enforces
a time gap between authentication attempts. In case if you receive “rejected connection”
message, you must wait a little bit (20-30 seconds is enough) and after that try
to establish connection again.
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VNC Deployment Wizard: How to configure UltraVNC NTLM logon permissions?
UltraVNC ACL File Format
allow 0x3 domain\account
or
deny 0x3 domain\account
0x1 is ViewOnly, 0x3 is Interact and implies that you can also view the remote desktop.
domain can be a computername or the name of a domain.
If domain is not specified (like deny 0x3 account), Windows tries to match the account name to a local or a domain account.
It is not recommended to omit the domain part since this may lead to unexpected results.
account can be groupname or username.
If the accountname contains spaces, the domain\account expression is to be enclosed in quotationmarks:
allow 0x3 "domain\account"
Even if the accountname doesn't contain spaces, quotationmarks won't hurt.
MSLogonACL has two abbreviations for special domains:
one dot to denote the computername and two dots to denote the computer's domain:
.\account for a local account on the computer
or
..\account for an account in the computer's domain.
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VNC Deployment wizard. Error: "Access Denied" error during deployment.
-
Make sure that you have entered a valid administrative logon credentials
- If the PC you are trying to deploy to is a Windows XP based then you must turn off "Simplified File Sharing" feature. Open Windows Explorer. Tools->Folder
Options->View. Uncheck "Use simplified file sharing" item.
- Target PC might have Distributed COM setting disabled. Please read the following article about how to enable it.
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VNC Deployment Wizard: Win32_Product class is not installed.
The Win32_Product class is not installed by default on Windows Server 2003. If you
want to run the VNC Deployment Wizard against a Windows 2003 machine you’ll need
to do the following:
- In Add or Remove Programs, click Add/Remove Windows Components.
- In the Windows Components Wizard, select Management and Monitoring Tools and then click Details.
- In the Management and Monitoring Tools dialog box, select WMI Windows Installer Provider and then click OK.
- Click Next.
If you want to script the above steps, using sysocmgr.exe with an answer file should work (does not support remote operation though):
http://groups.google.co.uk/groups?selm=%23UR5Hri%24EHA.2984%40TK2MSFTNGP09.phx.gbl
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How can I use "Action scripts"?
Action scripts allow you to have powerful control on how you connect to or disconnect
from VNC/RDP server. For instance, in some companies administrator can use LAN to
connect to one of his servers and he has to establish VPN connection to connect
to another server. Action scripts is a solution for him to avoid manually establishing
VPN connection each time he needs to connect. He can write two VBscripts. One will
establish VPN connection and another will terminate it. Now he can assign connection
script to pre-connect server event. So this script will be called each time he selects
Connect to Server command. And he can assign another script to post-disconnect event.
In this case his VPN connection will be closed after he got disconnected from server.
The same scheme can be applied fro dial-up connection and many other situations.
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What ports are used by VNC Manager when working with a remote computer?
VNC: 5900 (default), RDP: 3389 (default)
WMI is used for all management features, which means that WMI ports must be open
on a remote computer.
VNC Deployment Wizard requires access to ADMIN$ or any other writable share on remote
computer. The ports can be opened using Group Policy Editor. Start "gpedit.msc"
snap-in. Navigate to Computer Configuration->Administrative Templates->Network->Network
Connections->Windows Firewall->Domain/Standard Profile and enable the following
values: Allow Remote Administration Exception and Allow File and Printer Sharing
Exception.
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How to troubleshoot WMI-related issues in Windows XP SP2.
A number of security lockdown changes in Microsoft Windows XP Service Pack 2 (SP2)
may cause problems with Windows Management Instrumentation (WMI), especially in
remote scenarios. The
following article provides information on how to use WMI based software
to manage WindowS XP SP2 based computers:
http://support.microsoft.com/default.aspx?scid=kb;en-us;875605.
If you still receiving an "access denied" error, you might want to disable
the "Simplified File Sharing" feature.
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"Not all recipients received the message." error when trying to use Send Console
Message command.
This error is not caused by bug or problem with VNC Manager. To make sure just run
a "net.exe send" command from a command line and you will receive the same error.
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Network scan fails to find most of VNC/RDP servers
Microsoft have recently imposed limitations to the amount of half opened outbound
connections a program can make in their latest service pack for Windows XP: SP2.
If you are interested in the details then look here:
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/sp2netwk.mspx
then scroll to the TCP/IP section and read the section titled "Limited number
of simultaneous incomplete outbound TCP connection attempts". This affects
VNC Manager as when it scans for computers it creates many simultaneous connections,
which may or may not respond.
Please read the following
post in our forum for information on how this problem can be fixed.
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How to configure a registered server to connect via UltraVNC Repeater?
SmartCode VNC Manager has been tested with the latest version v1.0.4 (at the moment
of writing this article) of the Repeater. It supports connection in Repeater Mode
I and II. Take a look on the following
Forum thread for information on how to configure the VNC Manager.
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How to apply default logon settings to a group of registered computers?
SmartCode VNC Manager allows to set so called per-group logon credentials and let
the computers belonging to this group use the same logon credentials. If you have
many computers registered in a group there is a fast way to configure all the registered
computers to use the group logon credentials. Click here to watch a demo video.
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Unable to establish connection to Terminal Server console sessions
This is not a bug in the VNC Manager. The cause of the problem is a bogus security patch released by Microsoft back in October 2005.
Read the following article for more information: http://www.computerworld.com/blogs/node/1173
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