Zimbra Collaboration Suite Open Source Edition On CentOS

This tutorial shows how to set up Zimbra Collaboration Suite - Open Source Edition on CentOS. This tutorial covers installation of CentOS, dependencies for ZCS and setup of Split DNS when working behind a firewall. This tutorial is based on the way I set this server up and is only a suggestion. It carries no guarantees and it is highly suggested that you do this on a test server first to verify functionality. If you don't have a test server available you should download VMWare Server 1.0 and perform this tutorial on a test virtual server.


1 Requirements

To install this system you will need the following:


2 Preliminary Note

In this tutorial I use the hostname mail.geekdept.com with the IP address of and a gateway of These settings should be replaced with the appropriate hostname and IP address for your setting.


3 Installion of CentOS 5

Insert your CentOS install CD into your system and boot from it. Hit Enter to start the installation.

You are first asked if you would like to test the CD Media. You can choose skip.

After this the installer starts. Click on Next.

Next you are asked for language.

In my case I chose English and it then ask for which English. I'm in the US so I choose US English.

A box pops up warning you about initializing the drive.

No changes need to be made on the next screen.

Again you are warned of the iminent doom of your disk.

Network Devices gives you the opportunity to enter IP address information for your network. Keep in mind that you cannot run an email server using DHCP. Use the edit button and enter information appropriate for your network. Don't forget to enter your gateway and nameservers as well.

Next you are asked for your time zone.

Enter a password for the root account.

Now it is time to choose the packages to install. Uncheck all boxes in the upper pane and check the box for the CentOS Extra Packages in the lower pane. Click the radio button for Customize Now and click Next

A box will pop up verifying your IP address information. The next screen allows you to choose packages for your installation. You want the following packages:

Text-based Internet

Development Libraries
Development Tools
Legacy Software Development

Base System
Legacy Software Support

Once you have selected the pacakages click Next and it will search for dependencies.

It is now ready to begin the installation. Click Next to begin.

The installation should only take a few minutes because we are installing the bare minimum.

Click on Reboot once the installation is finished. Be sure to remove your installation CD as well.

Once the system reboots you are presented with the firstboot screen. This feature is very helpful because it allows you to make changes to the firewall. Using the keyboard choose Firewall click tab to move to the Run Tool button and hit enter.

For Security Level choose disabled and choose disabled for SELinux as well. Choose OK.

Now you are back at the main firstboot screen. You can tab to the Exit button.

Please note that we have now disabled all security on this box. If this computer is not behind a firewall it could be compromised quite easily.

The last step is to shutoff some services that will interfere with ZCS.

chkconfig sendmail off
chkconfig ip6tables off
chkconfig iptables off

We need one package before we can continue:

yum install libtool-ltdl

This completes the base installation of CentOS. On the next page we will setup Split DNS which is essential for ZCS. Go ahead and reboot, and fill up that coffee cup.

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6 Comment(s)

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When you do "yum install libtool-ltdl " you'll probably also have to do "yum install compat-libstdc++-33 compat-libstdc++-296". My system certainly didn't have those components and they are a prereq for ZCS.

By: Mike D

I also found sysstat wasn't installed!

 yum install sysstat


Please note that Zimbra does not support CentOS. (Its NOT identical to RedHat.)
RedHat servers are supported.
Zimbra team suggests using Ubuntu 6.06.1 LTS instead.


By: patrick

while installing on centos,after unpacking your zcs setup marked RHEL, use this command to install:

#sh .install.sh --platform-override

this worked perfectly for me:)

By: Anonymous

if you select centos extras it will restart the installation, something about error !!!!

By: Anonymous

It seems that the installation of Zimbra 6 on CentOS 64 requires "sysstat" to be installed. Without it, installation fails. This is not mentioned in the instructions. I don't know if this is true for 32 bit versions.