Wordfence is a free firewall and anti-virus plugin for WordPress websites. Just sign up on Wordfence website to get a free API key.
Main features:
Real-time traffic shows when crawlers and scrapers visit
Scan Core files for infections
View changes and repair Core files
Scan comments for blacklisted malware URL’s
Scan posts and pages for blacklisted malware URL’s
Scan for known malware files
Scan files for malware/virus URL’s
Block fake Googlebots and aggressive crawlers
Block brute-force login attacks
View top content consumers and Page Not Found errors (404)
Monitor disk space and check password strength
Scan for DNS changes
Monitor for dangerous IPs
Get free API keys
