Server (please complete the following information):Ĭopyright (C) 1999-2020 TigerVNC Team and many others (see README.rst)ĭecodeManager: Creating 4 decoder thread(s) If it is having problems negotiating compression features, then retry with something (anything) that will actually allow a connection.Ĭlient (please complete the following information): The TigerVNC vncviewer program should connect successfully.

All connection attempts will fail even though you can successfully connect with UltraVNC vncviewer to verify the server actually works.

Attempt to conenct to that system with TigerVNC.

Install UltraVNC 1.3.2 圆4 on a Windows 10 computer.

The vncviewer just crashes and will not connect.

Connecting to this system with TiverVNC 1.11.0 vncviewer results in 'Attempted to configure an invalid screen layout'. Connecting to this system with UltraVNC viewer works fine without any problems. Today, we saw how our Support Engineers resolve this error message for our customers.Windows 10 with UltraVNC 1.3.2 圆4 all default options. In short, the unable to connect error could trigger due to incompatible encryption settings or due to the version of the VNC running in the remote server. If not, they upgrade VNC Server to a more recent version.Ī not much-recommended method to fix the error is to weaker the level of encryption. Then, they try to change the VNC Viewer Encryption parameter to Server, PreferOn or PreferOff.Īs the alternate cause for this error would be the version of the VNC server, they also ensure that the latest version of VNC Connect is installed on the remote computer. The first thing that our Support Engineers try to fix this error is to change the VNC Server Encryption parameter to something other than AlwaysOff on the remote computer. How to fix unable to connect to VNC Server using your chosen security settingĪs discussed earlier, this error generally happens due to incompatible encryption settings between VNC Viewer and VNC Server.

Legacy VNC server running on the remote computer or third-party VNC-compatible software that does not support encryption.

Incompatible encryption settings for a direct connection between VNC Viewer and VNC Server.

Our Support Engineers have noticed these error mainly due to the following reasons:

Often while connecting to VNC Server from VNC Viewer an error message as shown below triggers.Īt times, the error message may vary and looks like the one below: No Matching Security Types Today let us discuss some common causes for this error and how our Support Engineers tackle them.Ĭauses for unable to connect to VNC Server using your chosen security setting

Unable to connect to VNC Server using your chosen security setting is a common error that triggers while webmasters connect to VNC Server from VNC Viewer.Īs a part of our Server Management Services, our Support Engineers helps to fix similar VNC errors regularly.

Invalid vnc server specified