version 1.0.0, 2014-07-11 : Initial version
Configure an unencrypted vnc serverHow to configure an unencrypted VNC server and to connect to.
This procedure has been tested on a CentOS 6.5 environment, so it could differ from yours if you’re not using the save OS or version.
Here we are installing and configuring a vnc server on a server which IP is: 192.168.1.10.
As using VNC implies using an X server, you’ll need to have and X11 environment
available. You can install one with
yum groupinstall -y Desktop which will
provide you a Gnome Desktop environment.
You will also need to have some users to use VNC with. For this example here, we
have created the
sleepy users (simply using
useradd -m <username>)
and changing their password (using
2. Server side installation and configuration
First things first, install the vnc server package:
sudo yum install -y tigervnc-server
Then configure it by editing the
/etc/sysconfig/vncservers file which should,
in the end, look like this:
VNCSERVERS="1:sleepy 2:grumpy VNCSERVERARGS="-geometry 800x600 -nolisten tcp" VNCSERVERARGS="-geometry 800x600 -nolisten tcp"
Then configure iptables to let the ports 5901 and 5902 in our case (if se had a 3rd one, it would be 5903) listening only on the 192.168.1.0/24 network (if you only have one administration gateway, you should think about a more restrictfull limitation) as root:
iptables -I INPUT 5 -p tcp -m tcp -m multiport --dports 5901:5902 -s 192.168.1.0/24 -j ACCEPT # Don't forget to save and restart service iptables save service iptables restart
Then, you need to su to each of your users to set their vnc passwords using the
vncpasswd command, which will create a
$HOME/.vnc/passwd password file.
sudo su - sleepy vncpasswd exit sudo su - grumpy vncpasswd exit
Once it’s done, you could start correctly your vncserver service as root:
service vncserver start chkconfig vncserver on
3. Client side configuration
On client part, you need to install the vnc client. Here we are using
package that provides
vncviewer, so we’ll first install it. Note that you’ll
need and x client for this to work, so if not already done, you’ll certainly
need to do a
yum groupinstall -y Desktop to get a Gnome.
sudo yum install -y tigervnc
You now can either use the graphical menu provided (in the "Internet" menu group of gnome) or use the command line (you need to set the correct USER to connect vnc configuration) like this:
USER=sleepy vncviewer 192.168.1.10:1 USER=grumpy vncviewer 192.168.1.10:2