How to allow UltraVNC Viewer empty password?

[hokuto]

Hi,

My VNC Server(tigerVNC server) is running with empty vncpassword.
When I connect with the VNC server from UltraVNC Viewer, it fails with message "Empty password".
It seems UltraVNC Viewer doesn't accept empty password as I can connect the server from other VNC viewer such like RealVNC Viewer.

Is there any solution to make UltraVNC Viewer to accept empty password?

Thanks.

[Rudi De Vos]

Sorry, i don't understand your question.

-server: Is the application runnning on the pc you want to see
-viewer: this show the remote screen, it's like a video player

The viewer ask a password if the server instruct them to ask it.
The server can allow or not a empty password but this has nothing todo with the viewer.

[hokuto]

Hi,

I set empty password on VNC server side.(VNC server password not userID's password)
This is because there are users who need to access the server from Mac built-in VNC Viewer.(Screen Share application)
(Mac built-in VNC viewer can't connect to VNC server where no password is set.)

Mac users can connect to the VNC server by clicking enter key when they are requested to input password.
Also I confirmed I can connect from RealVNC Viewer in the same way.
But when I try with UltraVNC Viewer and click enter key in password window, message "Empty password" is displayed and login fails.

Is this designed behavior of UltraVNC Viewer?

[Rudi De Vos]

You need to manual edit the ultravnc.ini file to allow an empty password
ultravnc.ini
[admin]
AuthRequired=1 <<< set to 0

It's a SERVER setting.. you need to modify the ultravnc.ini file in the same folder as winvnc.exe.
The viewer doesn't know anything...else someone could change a viewer to modify the way the server allow access.
Is this designed behavior of UltraVNC Server.

[hokuto]

Rudi,

Thank you for your response.
But unfortunately I couldn't tell the situation correctly.

I don't use UltraVNC server but TigerVNC server.
And I configured VNC server with empty VNC password.
Mac built-in VNC Viewer and RealVNC Viewer can connect the server as expected.
Only UltraVNC Viewer can't connect to the server.

Thanks.