A couple of updates/corrections: - The SSH implementation in MSYS2 does in fact work with the TurboVNC viewers (my bad. I forgot I had tested that.)
- I fixed the ExtSSH implementation in the Java TurboVNC Viewer, so it now properly redirects input and output from the SSH subprocess. Thus, '-via -extssh' in the Windows/Java TurboVNC Viewer should now work identically to '-via' in the native Windows TurboVNC Viewer. That fix is available in the latest 2.2.x stable pre-release build (https://turbovnc.org/DeveloperInfo/PreReleases) once Travis finishes spinning it. Let me know if you have any further problems or need additional help. On 3/18/20 4:10 PM, DRC wrote: > Several comments/questions: > > - Generally speaking, you should not execute VncViewer.jar directly. You > should use the vncviewer-java.bat (console) or vncviewer-javaw.bat (no > console) batch scripts, which will properly load the TurboVNC Helper. > That isn't the cause of this issue, but running the TurboVNC Viewer > without the TurboVNC Helper will result in a loss of functionality. To > pass Java system properties to the Java TurboVNC Viewer, set them in the > JAVA_TOOL_OPTIONS environment variable (e.g. 'set > JAVA_TOOL_OPTIONS=-Dturbovnc.foo=bar'.) > > - Are you sure that 5900 is the correct SSH port? 5900 is generally a > port on which a VNC server listens, not a port on which an SSH server > listens. That could be the source of the error. The default value of > SSHPort is 22, which is correct for most SSH servers. > > - When setting VNC_VIA_CMD in a .bat file, you have to escape the % > symbols, so your .bat file should look something like this: > > @echo off > setlocal > set VNC_VIA_CMD=ssh.exe -o StrictHostKeyChecking=no -o > UserKnownHostsFile=/dev/null -f -L %%L:%%H:%%R %%G sleep 20 > "c:\program files\turbovnc\cvncviewer.exe" -via {server}.{domain} > {other_TurboVNC_Viewer_args} localhost:{display_number} > > That could be the source of the error. > > - Neither viewer (Java nor native) accepts an argument of -vncpasswd. > That could be the source of the error. The Java TurboVNC Viewer accepts > -passwd, which seems to be what you're aiming for. The native Windows > TurboVNC Viewer does not have a mechanism for reading a VNC password > file directly. > > - I presume that ssh.exe is a Cygwin-derived implementation of OpenSSH, > but if it isn't, then please note that only Cygwin-derived > implementations of OpenSSH can be used on Windows with the native > Windows TurboVNC Viewer or the Java TurboVNC Viewer with -extssh. > Native Windows implementations of OpenSSH, including the Microsoft > implementation in Windows 10 and the MSYS implementation, do not > properly support the SSH fork option (-f). > > - In general, -extssh is not very well supported in the Windows/Java > TurboVNC Viewer. It won't work at all if any interactive input (such as > an SSH password or SSH public key passphrase) is required. Thus, I > would recommend using the native Windows TurboVNC Viewer (cvncviewer), > which would mean that you need to find another way to read the VNC > password file and pass it to that viewer. > > - If you are connecting to the TurboVNC Server or another Un*x Xvnc > server, then you need to specify the display number. Otherwise, the > TurboVNC Viewer will connect to display :0 by default, which is probably > not what you want. That could be the source of the error. > > If none of those is the source of the error, then please tell me what > the error actually is. "No success" doesn't tell me anything useful. > > DRC > > On 3/17/20 7:54 AM, [email protected] wrote: >> Hi Folks, >> >> I have been using TurboVNC through an SSH tunnel on Windows. However, >> when my clients connect they receive a confirmation window because the >> host key is unknown. Since my environment is controlled, I would like to >> skip this warning message and just connect (something similar to ssh -o >> StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null user@host). >> >> I have tried to use both cvncviewer.exe and VncViewer.jar for this, but >> with no success. >> >> In both cases, I created a .bat file with the following content: >> >> /@echo off/ >> /SET VNC_VIA_CMD=ssh.exe -o StrictHostKeyChecking=no -o >> UserKnownHostsFile=/dev/null -f -L %L:%H:%R %G sleep 20/ >> /java -jar VncViewer.jar -via server.domain -sshport 5900 -vncpasswd >> vncfile -ExtSSH localhost/ >> >> I have also tried this other way, but with no luck... >> >> /@echo off/ >> /java //-Dturbovnc.via="ssh.exe -o StrictHostKeyChecking=no -o >> UserKnownHostsFile=/dev/null -f -L %L:%H:%R %G sleep 20" //-jar >> VncViewer.jar -via server.domain -sshport 5900 -vncpasswd vncfile >> -ExtSSH localhost/ >> >> What am I doing wrong? >> >> Cheers, >> >> Rafael -- You received this message because you are subscribed to the Google Groups "TurboVNC User Discussion/Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/turbovnc-users/968fd16c-0c42-f972-b0d4-10c889600772%40virtualgl.org.
