Revision as of 08:10, 9 November 2012

VNC

How to install VNC

Pretty straight forward, x11vnc is reliable vnc server which doesn't take much or even all the CPU usage. To install it run:

# yum -y install x11vnc

How to setup VNC on demand

To improve the usage of VNC, it can be triggered by xinetd, a configuration file under `/etc/xinetd.d` must look like

service x11vnc
{
        disable         = no
        socket_type     = stream
        protocol        = tcp
        port            = 5900
        wait            = no
        user            = root
        server          = /usr/bin/x11vnc
        server_args     = -inetd -display :0 -scale 2/3 -ncache 10 -auth /var/gdm/\:0.Xauth -usepw -rfbauth /opt/bashlinux/.vnc/passwd -o /opt/bashlinux/.vnc/x11vnc.log
}

That means that a service with such name must be created in order to let xinetd know which service to trigger when the desired port is bind. it could be accomplished by adding it to `/etc/services`

# echo "x11vnc 5900/tcp" >> /etc/services

At the end, ensure that X server grants access to DISPLAY 0 by adding at the end of the `~/.bashrc` file:

xhost +

#!wiki important
'''Important'''
 
Please ensure that xinetd is installed before start VNC setup.

How to setup VNC on demand over SSL

Some things that should be considered in order to get connection to a VNC terminal are:

• Iptables is set to only listen for VNC calls from server, to get connection from your terminal you need to remove the statement `-s 10.0.0.1` on `/etc/sysconfig/iptables` rule for vnc.
• For Mac users doing VNC over SSL, ssvnc is available at [[1]]
• add the following option at the end of the `x11vnc` command arguments

 -ssl SAVE
 

Links

• x11vnc certificates and key management

[[2]]