ModSecurity is a potent web application layer firewall for Apache web servers. It monitors the entire HTTP traffic to a website without affecting its functionality and in case it discovers an intrusion attempt, it blocks it. The firewall furthermore keeps a more thorough log for the site visitors than any web server does, so you shall manage to monitor what is happening with your Internet sites better than if you rely merely on standard logs. ModSecurity employs security rules based on which it stops attacks. For instance, it identifies if someone is trying to log in to the admin area of a certain script multiple times or if a request is sent to execute a file with a specific command. In such cases these attempts set off the corresponding rules and the firewall blocks the attempts in real time, after that records detailed info about them in its logs. ModSecurity is among the very best software firewalls available and it can easily protect your web applications against thousands of threats and vulnerabilities, particularly in case you don’t update them or their plugins frequently.