To prevent unwanted visitors from accessing your site, you can block their IP address using the IP Deny manager.
How to access IP Deny Manager
1) Log into your cPanel (Server.arvixe.com/~username) or (Domain.com:2082)
*Server is your server, so replace server with the server
*Domain.com, replace domain.com with your actual domain if the domain has the name servers pointed to your server
2) Browse through cPanel and look for IP Deny Manager. (Image below)
3) Click "IP Deny Manager". Add an IP Address here that you don't want visiting your website and it will ban them from the server. (Image below)