How to Set Up Ultra VNC So it Will Pass Through the Firewall

Set up Ultra VNC to connect through a firewall.

Ultra VNC offers several features to help ensure a solid connection between the remote client software and the server software under most network conditions. If the remote client fails to connect to the VNC server computer, many times there is a firewall blocking connection from the remote client to the VNC server computer. By making a few changes you can enable Ultra VNC to connect through the firewall.

Things You'll Need

• Microsoft Windows computer with Ultra VNC Server software installed
• IP address of the Windows computer with Ultra VNC Server software installed
• VNC Client computer with Internet connection
• External IP address of the firewall

Instructions

1. Enable port forwarding on the firewall to forward external requests for a port number between 5900 and 65535 to the IP address of the Windows Ultra VNC Server computer.

2. Click the "Start" button on the Windows Ultra VNC Server computer then click "Programs" (if running Windows Vista or 7) or click "All Programs" (if running Windows XP) and then click the "Ultra VNC" program group then "Edit Settings."

3. Select the "Network" tab then click the "Manual" radio button in the "Incoming Connections" section then change the "RFB Port:" setting to the same port number that was configured for port forwarding on the firewall.

4. Click the "Save to ultravnc.ini" button to save the settings and then reboot the computer and verify that the Ultra VNC Server software is running.

5. Connect to the Windows Ultra VNC Server computer from a VNC Client computer located on the Internet by typing the external IP address of the firewall followed by "::1234" replacing "1234" with the port number configured in the Windows Ultra VNC Server computer and press the "Enter" key to connect.

References

• uVNC:UltraVNC Configuration

Resources

• Port Forward: Router List