SSH tunneling VNC as a solution for slow SSH X11

1. Install VNC Server

• X11 VNC
• TigerVNC

Server$ sudo apt-get install tigervnc-standalone-server
Server$ vncpasswd
#Passwd:
#Verity:
#Would you like to enter a view-only password (y/n)? n
 
vi ~/.vnc/xstartup
vi ~/.vnc/config

for gnome

# ~/.vnc/xstartup
 
#!/bin/bash
xrdb $HOME/.Xresources
export XKL_XMODMAP_DISABLE=1
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
gnome-session

for xfce4

#!/bin/sh
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
/usr/bin/startxfce4
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
x-window-manager &
 

config

# ~/.vnc/config
geometry=1920x1080
# geometry=3840x2160
# geometry=1440x900
dpi=96

Server$ chmod u+x ~/.vnc/xstartup

2. Start VNC Servr

Server$ vncserver
New Xtigervnc server 'Server:2 (server)' on port 5901 for display :1.
Use xtigervncviewer -SecurityTypes VncAuth -passwd /home/username/.vnc/passwd :1 to connect to the VNC server.

display ‘:1’ is VNC display number 5900 + display number is VNC sever port.

3. VNC port Tunneling

# tunneling and connect ssh server
localhost$ ssh -L vnc_client_port:localhost:vnc_server_port user_name@name_of_server
ex) localhost$ ssh -L 12345:localhost:5901 server_user@IP_or_domain -p sshport(22)
 
# setting display
Server$ export DISPLAY=:display_number
ex) Server$ export DISPLAY=:1
 
# check VNC status
Server$ vncserver --list
X DISPLAY 	RFB PORT 	RFB UNIX PATH	   PROCESS ID 	SERVER
1                         	5901      	                               	12994               	Xtigervnc

4. VNC viewer

install VNC viewer and connect While VNC port tunneling, localhost:vnc_client_port ex) localhost:12345

5. VNC close

Server$ vncserver -kill :display_number
ex) Server$ vncserver -kill :1

# stop ssh tunneling
Server$ exit