With the help of the IP Allow Manager you can allow specific IP addresses to access your website. This feature will let you allow a range of IP addresses to access your website in case they were blocked. It's also very useful if you want to deny all access to your website, except only specific IP's. To locate the manager, access your website's Control Panel and search for the IP Allow Manager menu.
From the "Allow an IP Address" section you can add IP's that will be whitelisted and allowed on your website.