Open the URL: If this prompts you with the warning: Your connection is not private, click the Advanced button and proceed to the link.Reload the firewall for changes to take effect using this command: firewall-cmd -reload.Replace the zone value and run this command for all active zones. Note: This command is an example when the zone is public. Run the following command for each active zone: firewall-cmd -zone= public -add-port=4040/tcp -permanent The outcome lists your active zones (public, DMZ, etc.).Run this command to retrieve active zones: firewall-cmd -get-active-zones.Configure the CentOS firewall using the steps given below for allowing the remote administration (through port 4040) and protocols of Kerio Connect:.

If the installation is successful, the active status displays as Active (running), as seen in the screenshot below: Check the status of Kerio Connect service using the command: systemctl status kerio-connect.Once the installation completes, an output similar to the following displays as the confirmation: Install Kerio Connect using the following command: sudo yum install kerio-connect-9.2.10-4692-linux-x86_64.rpm.Use the following commands to disable and stop the postfix service to the Kerio Connect installation without interference:.Check the status of postfix using the command systemctl status postfix as shown in the screenshot below:.You can also use the WGET tool to download. Download the latest version of Kerio Connect for RPM-based systems.Enable the Apply security policy in the process, as shown below:.Install CentOS 7 (subversion 7.6 or above) using the official step-by-step guide.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). This article shares the process of installing Kerio Connect on the CentOS 7 operating system.

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