cPanel and WHM logins will transmit the sensitive username and password through the internet and it need to be secure. If anyone intercepts the traffic, they will be able to decode the username and password if they are submitted in a insecure page. Hence it is quite vital to use secure pages for WHM, cPanel and Webmail logins.
SSH is the gateway to a linux server. To do any advanced tasks in the server, we need the command line access and it is provided by the SSH service. So, keeping the SSH access to a server secure means keeping the server secure.
Keep your ClamAV software and it's virus definitions is critical in maintaining your web server's security. Learn how to activate and update ClamAV on a cPanel.
Being a server admin, it is a vital part of the admin to protect their servers from different types of attacks. The most common one among them is the brute force attack, where the attacker tries to login to the server or email or any password protected area using trial and error method. Learn how to protect your server from brute force attacks.