Security Firewall Plugin Wordfence Download(Premium) GPL License, can be updated online .Wordfence is the best Wordpress security (Security) plugin, powerful and easy to set up the effect is obvious. The main features are blocking/restricting malicious crawlers and robots, powerful firewall, blocking specific regions/devices/IP access, 2FA installation login, regular automatic scanning, access to traffic monitoring and so on. It can also scan and compare theme and plug-in code, monitor code operation and find abnormal code in time.