Prerequisites Checking Before Install Zimbra Collaboration Suite 8 on CentOS 6.3

zimbraBefore you start installing Zimbra Collaboration Suite (ZCS) 8.0.1 or 8.0.2, there are a few prerequisites checking have to be performed. This is to ensure that the installation running smoothly without any interruption while saving your time to troubleshoot. I have installed Zimbra Collaboration Suite 8.0.1 and 8.0.2 on many CentOS 6.3 and i would like to share my experiences.

1. Make sure your target mail domain (e.g ehowstuff.local) has mx record on your DNS server.

[root@mail ~]# host -t mx ehowstuff.local
ehowstuff.local mail is handled by 0 ehowstuff.local.

2. Stop and disabled the following services :

[root@mail ~]# service iptables stop
[root@mail ~]# service ip6tables stop
[root@mail ~]# service sendmail stop
[root@mail ~]# service postfix stop

3. Disabled auto start the following services :

[root@mail ~]# chkconfig ip6tables off
[root@mail ~]# chkconfig iptables off
[root@mail ~]# chkconfig sendmail off
[root@mail ~]# chkconfig postfix off

4. Disabled Selinux :

[root@mail ~]# setenforce 0
[root@mail ~]# vi /etc/selinux/config

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.

5. Make sure the following dependencies software has been installed :

[root@mail ~]# yum install perl nc sudo sysstat -y
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