ModSecurity is a highly effective web application layer firewall for Apache web servers. It monitors the entire HTTP traffic to an Internet site without affecting its operation and in case it discovers an intrusion attempt, it prevents it. The firewall furthermore keeps a more detailed log for the website visitors than any server does, so you shall be able to keep an eye on what's going on with your sites better than if you rely simply on standard logs. ModSecurity works with security rules based on which it helps prevent attacks. For example, it recognizes whether somebody is trying to log in to the administrator area of a particular script multiple times or if a request is sent to execute a file with a certain command. In such situations these attempts set off the corresponding rules and the software blocks the attempts in real time, after that records in-depth details about them inside its logs. ModSecurity is one of the very best software firewalls available and it can protect your web apps against a huge number of threats and vulnerabilities, particularly in case you don’t update them or their plugins frequently.