Using a Web browser to Connect to VNC Server
To run an application that features a graphical user interface (GUI) on a System i™, you must use either a VNCviewer or a
Web browser to connect to the Virtual Network Computing (VNC) server. You must run the VNCviewer or Web browser on
a graphics-capable platform, such as a personal computer.
Note: The following steps require you to know your display number and VNC password. Starting the Virtual Network
Computing (VNC) server determines the value for the display number. Creating a VNC password file sets the VNC password.
Using a VNCviewer to access the VNC server
Using a Web browser to access the VNC server
To use a Web browser to connect to the VNC server, complete the following steps:
Start the browser and access the following URL:
systemname is the name or IP address of the system that is running the VNC server
nn is the 2-digit representation of the VNC server display number
For example, when the system name is system_one and the display number is 2, the URL is:
Successfully accessing the URL displays a prompt for the VNC server password. At the password prompt, type the
VNC password to gain access to the VNC server display.
Using the browser client is really convenient, but it does rely on Java, and some browsers⁄configurations will have problems with Java.
Note that you should NOT include “http:” in the URL.
Another viewer is vinagre, which for instance is bundled with Ubuntu. Use the same command-line format as vncviewer above.
Configure your internet firewall to pass traffic coming in on ports 5800, 5900, and 5901 on to your computer.
For connecting to a vnc server over the internet, you need to know it’s public ip address.
This can be done through an IP-reporting website, such as What is My IP Address