Overview

This article shares the process of installing Kerio Connect on the CentOS 7 operating system.

Note: This process was tested on the sub-version CentOS 7.6 and is expected to be the same for all higher sub-versions (7.7 and above).

Prerequisites

1. Install CentOS 7 (subversion 7.6 or above) using the official step-by-step guide.
2. Enable the Apply security policy in the process, as shown below:
   

Process

Follow these steps:

1. Download the latest version of Kerio Connect for RPM-based systems. You can also use the WGET tool to download. 
2. Check the status of postfix using the command systemctl status postfix as shown in the screenshot below:
   
   
   
   
3. Use the following commands to disable and stop the postfix service to the Kerio Connect installation without interference:
   
   1. systemctl disable postfix
   2. systemctl stop postfix
      
      
   
   
   
4. Install Kerio Connect using the following command: sudo yum install kerio-connect-9.2.10-4692-linux-x86_64.rpm. Once the installation completes, an output similar to the following displays as the confirmation:
   
   
   
   
5. Check the status of Kerio Connect service using the command: systemctl status kerio-connect. If the installation is successful, the active status displays as Active (running), as seen in the screenshot below:
   
   
   
   
6. Configure the CentOS firewall using the steps given below for allowing the remote administration (through port 4040) and protocols of Kerio Connect:
   1. Run this command to retrieve active zones: firewall-cmd --get-active-zones
   2. The outcome lists your active zones (public, DMZ, etc.). Run the following command for each active zone: firewall-cmd --zone=public --add-port=4040/tcp --permanent
      

      Note: This command is an example when the zone is public. Replace the zone value and run this command for all active zones.

   3. Reload the firewall for changes to take effect using this command: firewall-cmd --reload
      
      
      
      
7. Open the URL: https://your_CentOS_IP:4040/admin. If this prompts you with the warning: Your connection is not private, click the Advanced button and proceed to the link.
   
   
   
   
8. Follow the steps shared by the installation wizard to perform the initial configuration of Kerio Connect.

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Confirmation

Successful completion of the installation can be verified by the following:

• Kerio Connect Webadmin portal loads successfully.
• Checking if the status of all services is running in the Kerio Connect portal, under Settings > Services, as shown in the screenshot below:
  
  

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