############################################################################
# Secure VNC
# 
# mostly abridged from: 
#       http://www.ep.ph.bham.ac.uk/general/support/vncsetup.html 
# 
# steps listed in order of event 
# 
# VERSION: 2019.04.18.0001
# 
############################################################################

############################################################################
# On the VNC "server"
############################################################################

#
# We assume that TigerVNC (or simlar) is installed on your desktop system.
# We assume that your dekstop is windows (if not, translate for you OS type).
#

#============================================================================
# On your server - Linux system (assume CentOS/RHEL).
#============================================================================

# 
# Install pkgs (some are optional, but this all works).
# 
yum -y install xorg-x11-server-Xvfb.x86_64 xorg-x11-fonts-Type1 \
	tigervnc.x86_64 tigervnc-icons.noarch tigervnc-license.noarch tigervnc-server.x86_64 tigervnc-server-module.x86_64

yum -y groupinstall "GNOME Desktop" "Server with GUI" "System Administration Tools" "System Management"

# Extras (ones I want/like)

yum -y install \
	meld kompare diffuse tkdiff ansible tree redhat-lsb-core bind-utils \
	VirtualBox mlnx-ofa_kernel-4.3-OFED \
	gnome-backgrounds.noarch \
	f22-backgrounds-mate.noarch  f22-backgrounds-gnome.noarch \
	kdeartwork-wallpapers.noarch kde-wallpapers.noarch \

# 
# This is necessary only once, but can be changed whenever necessary
# 
mbaker# vncpasswd

# 
# I'm using session number 50 
# 
mbaker# vncserver :50

# 
# You can pick the resolution you like, can be modifed later too.
# 
mbaker#sudo vi /etc/sysconfig/vncservers
	
	VNCSERVERS="50:mbaker"
	VNCSERVERARGS[50]="-geometry 1680x1050 -localhost"
	                            #^^^^^^^^^ pick what your client supports


############################################################################
# On your dekstop (Windows)
############################################################################
#
# You must have TigerVNC (or similar, VNC works as well) installed
#

#use either port forwarding in a cygwin or a putty session
	#5900 - is the well known port
	#5950 - 50 is the example session number, change as appropriate

	#setup the ssh tunnel for VNC to go through
	ssh -L 5900:localhost:5950 mbaker@mylinux
	                     #^^^^ change accordingly
								#
	ssh -L 5900:localhost:5950 mbaker@mygateway
	                     #^^^^ change accordingly

	#
 	# "Option 1: directly connect to VNC" (THIS IS NOT USING THE TUNNEL)
	# $X - your viewer number, 50 in the above example
 		vncviewer mylinux:$X

 	# "Option 2: securely connect VIA THE TUNNEL over SSH"
	#  $X - your viewer number, 50 in the above example
 		#running VNC from a unix system
 		vncviewer -via $USERNAME@mylinux localhost:$X
	
 		#running VNC from a windows system
		/cygdrive/c/"Program Files"/TigerVNC/vncviewer.exe localhost
			#use the correct server-hostname and session number in the box

# In the desktop, pre "F8" for menu (config menu)

# To be able to cut-n-paste between windows and VNC

# You must have "vncconfig" running on the VNC session, 
# and check the the 3 checkboxes.
#
# After that, you can:
#
#	~/.vnc/xstartup
#		nohup vncconfig -iconic &
#
# IF you cannot cut-n-paste after starting vncconfig, then close out
# your viewer and start up the viewing again, should work now.

#
# OPTIONAL: RESIZE display size/resolution
#
# On the VNC Server node:
	xrandr
	xrandr -s ####x####

	# Some examples
	xrandr -s 1680x1050
	xrandr -s 1280x800
	xrandr -s 1440x900

# Then, on the client
	vncviewer  # Then setup screen options

#==============================================================================
# OLD STUFF
#==============================================================================
vncserver
vncclient

SERVER: ~/.vnc/xstartup

	#!/bin/sh
	xrdb $HOME/.Xresources
	xsetroot -solid grey
	xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
	/usr/dt/bin/dtsession &
	#twm &

Download: http://www.realvnc.com/products/download.html

On the unix server:  vncserver :X
	where X is your desktop number (say 10 in this case: vncserver :10)
	default is "1"

On the client: run the vncclient, put in the unix-server-name:# i.e. wbxdimg01:10

To get more windows, in the first window that was up (not required, but is
better this way  a master window that holds all the background jobs): do a xterm &.
If it doesnt come up (the xterm), then do a export DISPLAY=localhost:10, then try the
xterm & again, should work.

To expand/shrink a window:  select the top right window corner  right MB,
then drag.  To decrease, you must first increase and then decrease as one action  bug.

To kill a hung window  on the desktop of VNC, right click, get a menu, select
kill, place the skull and crossbones over the window to kill and left MB.

You are in TWM.

To get X-Windows menu:  on the menu bar of the window try CONTROL-KEY AND-
left/middle/right MB, in the text area of window, try the same  you will see many
different menus.   SHIFT and MBs will give other menus.

ON the VNC menu bar, right click and you will get an options menu.

#====================================================================================