Working with the Kerio Connect Virtual Appliance (CentOS Edition - Kerio Connect 7.2.x and earlier)


This information is provided 'As Is' and Kerio Technical Support will not be able to help you further if you have any problems.

First ensure that you are running the CentOS variant of Linux. You can use the following command: sb_release -a

The output from this clearly displays the linux type. If you are using Debian, refer to this topic instead.

With Kerio Connect 7.2.x and earlier, the Kerio Virtual AppliancePre-configured Kerio Connect virtual machine image for VMware. comes with CentOS as an operating system. In order to minimize the size of this Virtual Appliance, there are some helpful debugging tools that are not part of the operating system and you may need to install them manually.

You can use the Synaptics program from the graphical desktop of your server to install these tools, or you can do so from a command line as follows:

Program Description Installation Command
Telnet Helpful tool for testing connectivity to a network socket and issuing commands. yum install telnet
Dig DNSDomain Name System - Enables the translation of hostnames to IP addresses and provides other domain related information. tool to lookup hostnames. yum install bind-utils
Nano Simple text editor. yum install nano
VNC server Remote Desktop server, to enable remote access to the server. yum install vino

In case of VNC server, the following additional configuration is required:

  • Accessing the preferences and enabling remote desktop.
  • Setting up a VNC password that can be different to your Kerio Connect admin password.

You can access Configuration using the following command: vino-preferences

You can check that the Vino server runs using the following command: lsof -i -n -P

Post installation, look for this line vino-serv 1818root17uIPv4110090t0TCP *:5900 (LISTEN) as it tells you that Vino uses port 5900 to allow access to the server desktop.

The Kerio Connect VM comes with a firewall IPTables. You can configure it through a terminal to allow port 5900 through using the following command: iptables -A INPUT -p tcp --dport 5900 -j ACCEPT.

Or, you can disable IPTables altogether, using the following command: iptables -F

Finally, test your connection with a program like realVNC or UltraVNC on a Windows machine, or Chicken of the VNC on a Mac. You need to enter your server address as follows: <>::5900


There are two colons :: in the address. The server name is the host name of your mailserver and the 5900 comes from the lsof output you obtained earlier.