Suggest me some good (FREE) or (CHEAP) plugin to use to protect my website from brute force attacks or any other vulnerabilities..
My all marks goes to shield security, When you look at it you will know how easy this plugin is to use and how many points it ticks off on your security audit checklist, you can see that they really take this mission to heart.
VaultPress is good but its a paid one. WordPress security plugin offers an easy way to back up your site daily or in real-time syncing all of your site content. In addition to daily backups, the service also scans and removes threats found in your files.
WordFence is the best ALL-in-one plugin which is essential for a wordpress. . It covers login security, IP blocking, security scanning, and WordPress firewall and monitoring.