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FAQ : IDEAL Remote

Schnelle und sichere Fernsteuerung für Windows, Mac OS X und Linux

Remote Control Tool (TightVNC)

How to troubleshoot "The connection could not be established because the protocol is unknown (xxx)" message?

When i try to launch the remote control with TightVNC, I get the "The connection could not be established because the protocol is unknown (xxx)" message, and I can't take the control of the remote host.

What can i do ?


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A third software (for example UltraVNC) seems to use the same default port than the one used by TightVNC.

Please try to change this number (with IDEAL Administration or IDEAL Remote) by using the right click on the remote computer, Remote control, \ Configure \ Connection tab).

If the ‘Auto’ box is checked, the 5900 port is used by default. Try to enter another number, for example 5901 and then relaunch the remote control.

You can also remove the VNC software installed on the remote computer to stop conflicts.

Also concerns the following software: IDEAL Administration
Last modification: 17/09/2019

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