The plugin Htaccess allows controlling access to your website using the directives Allow and Deny.
The Wordfence WordPress security plugin provides free enterprise-class WordPress security, protecting your website from hacks and malware.
One click security scan. Fast security audit the files of your WordPress install for hidden backdoors, code-eval, encrypted iframes and malicious link
6Scan Security provides comprehensive enterprise-grade security with frequent site scans, powerful firewall, automatic backup, web analytics and much
Kyplex keeps your website clean from viruses.