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ultravnc / UltraVNC

UltraVNC Server, UltraVNC Viewer and UltraVNC SC | Official repository: https://github.com/ultravnc/UltraVNC
https://uvnc.com
GNU General Public License v3.0
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Issue with file transfer (Explorer) #189

Open Bars7878 opened 7 months ago

Bars7878 commented 7 months ago

Hi! We got issue with enabling file transfer. Server runned as a service. Windows 10 machine work as kiosk without explorer, the interface is replaced by application software. . After reboot we can enable file transfer, but after closing window of file transfer we can not start file transfer again with error "Warning: File transfer is disabled on the remote machine" but file transfer is enabled in server parameters.

image

When we start explorer manually file transfer work again as expected.

Please, help us with understanding and resolving this issue.

Bars7878 commented 7 months ago

Hi! Can anybody from UVNC team help us?

RudiDeVos commented 7 months ago

The server use the explorer.exe to set the security level. You can try 2 things

1) For FT set impersonate user off ( server option), then the FT is done as system 2) Use an alternate shell, usual a kiosk pc has his own shell Add following to the ultravnc.ini [admin] alternate_shell=My.Alternate.Shell.exe

Neustradamus commented 3 weeks ago

@Bars7878: This ticket can be closed?

mmuel commented 1 day ago

I have the same problem, but I use local users and domain users/groups with New Ms Logon, no kiosk. It also happens that the group membership for the login cannot be resolved, the user for New MS Logon must be explicitly selected and authorized.

Only FTUserImpersonation=0 works, but is a security problem in my environment.

The problem has probably only existed since October (MS Patchday?)! Tested with Windows 10 and Server 2019. Dev-1.5.0.3 dont resolve the Problem.