Please enable / Bitte aktiviere JavaScript!
Veuillez activer / Por favor activa el Javascript![ ? ]

First Server Run

If you run ultravnc server for the first time, the settings "ultravnc.ini file" does not exist and firewall need to allow winvnc.


When no password has been set, ultravnc prompt you to set one.

When you are running on XP and winvnc was installed as service you first get the "runas"
box, DON'T FORGET TO UNCHECK else you tell runas that winvnc can't make changes to
a file.

First connection (loopback)

Now that the server is running, we can make a fast test connection in loopbackmode.(loopback mode= server+ viewer on same PC)

1* Tell server to allow loopback

2* Tell viewer to connect to the server

Start the viewer vncviewer.exe

When all is ok you should see the viewer showing himself like watching 2 mirrors( not usufull to do anything, but it tell server and viewer can connect)

First connection (local network)

Install viewer  on second PC ( the pc you gonna use the control the server)

* Use the installer and select viewer only.
* Or, copy vncviewer.exe on a usb stick and plug this in your viewer PC.
* Or, use a shared/mapped folder and copy.

The server ip address can be found by hovering the mouse over the vnc server tray icon.

Instead of "localhost" you need to enter this ip address

Internet Connection

We only handle 2 cases

A. Server has a official ip address
B. Server has a local ip and use a Nat router to connect to the internet.  The router has the
official ip address.
The way you connect is independed of the viewer ip address ( local, official)

A. Server has a official ip address

When the server has an official ip address there is no difference between a LAN or internet connection.  You need to enter the server ip in the viewer connection box.  ( see last part "First Run")

B. Server has a private ip and use a Nat router to connect to the internet.  The router has the official ip address.

The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets (local networks):

10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255

If your server has an ip address that's in one of the above ranges you are using some nat router to connect to the internet and the viewer can not make a direct connection to the server.
The solution is tell the nat router that he need to send a port to your local pc , the viewer connect to the nat router ip address.
Sample: