Clone, mirror remote server X Window System desktop environment on local client.

• Arch Linux Wiki
• tigervnc

Set up a VNC server that can only be connected to locally. Remote connection is only possible through "tunneling" via SSH.

• Start the server, await connection only from localhost $ x0vncserver -display :0 -rfbport=5901 -ZlibLevel=9 -ImprovedHextile -localhost.
• The x0vncserver requires a running X Window System session, therefore, start x0vncserver after the user is logged in.
• Verify that the port is open ss -ltunp | grep vnc
• Verify the connection $ nc -zv <IP> <PORT> should return <IP> <PORT> (rfb) open

• Configure the [SSH] server, and start it as as service.
• Connect to the remote server ssh -vvx -p <SSH PORT>49999 -i ~/.ssh/prv/[email protected] [email protected] -L <SSH PORT>49999:localhost:<VNC PORT>5901.

• For Gnome desktop install gnome-remote-desktop.

• Start the service for user systemctl start --user gnome-remote-desktop. It cannot be enabled.

• The service file is found at /usr/lib/systemd/user/gnome-remote-desktop.service.

• Assign "password" to disable "New connections must ask for access" gsettings set org.gnome.desktop.remote-desktop.vnc auth-method 'password'.

• To connect a password must be porovided, the problem is how to assign a password?

• Other options are org.gnome.desktop.remote-desktop.vnc view-only <bool>.

• For SystemD create a unit ~/.config/systemd/user/x0vncserver.service.
• Enable it systemctl --user enable x0vncserver.

• Connect to the server, multiple connections are possible:
  • ssh <SERVER IP>[email protected] -L <SSH PORT 1>:localhost:<VNC PORT 1> -L <SSH PORT 2>:localhost:<VNC PORT 2>.

For AVNC:

• Host 127.0.0.1:5901
• Use SSH tunnel 192.168.1.102:49999
• Select the private key

• Connect to remote desktop $ vncviewer -SecurityTypes None -AcceptClipboard -SetPrimary -SendClipboard -SendPrimary -FullColor -PreferredEncoding Tight -QualityLevel 9 -CompressLevel 9 -DotWhenNoCursor localhost::<PORT>5901.

• vncviewer -Log *:stdout:100

Event	Error	Cause	Consequence	Remedy
vncviewer	<IP> 5900 (rfb): No route to host	The IP or port may be unreachable.
vncviewer	X Error of failed request: BadMatch	The remote desktop is running wayland as display manager.	vncviewer is disconnected.	Change display manager to Xorg.
vncviewer	No error message.	The remote desktop is running wayland as display manager.	Connection results in a black screen.	Either switch display manager or find a VNC server that supports Wayland.
systemctl --user start x0vncserver	Authorization required, but no authorization protocol specified		Solved when display is correctly declared.
systemctl --user start x0vncserver	x0vncserver: unable to open display ":0"
vncviewer	The connection was dropped by the server before the session could be established.

First ensure that the hostname is associated with the $DISPLAY in .Xauthority:

• xauth list

xauth add $DISPLAY . ffffff

Declare an environment variable pointing to the current user's .Xauthority in systemd/user/x0vncserver.service:

• Environment="XAUTHORITY=/home/user/.Xauthority"