ModSecurity is a powerful web application layer firewall for Apache web servers. It monitors the entire HTTP traffic to a site without affecting its overall performance and if it discovers an intrusion attempt, it prevents it. The firewall furthermore maintains a more comprehensive log for the website visitors than any web server does, so you shall be able to keep track of what is going on with your Internet sites better than if you rely simply on standard logs. ModSecurity uses security rules based on which it helps prevent attacks. For example, it detects if somebody is attempting to log in to the admin area of a certain script a number of times or if a request is sent to execute a file with a certain command. In these instances these attempts set off the corresponding rules and the firewall hinders the attempts instantly, after that records in-depth info about them inside its logs. ModSecurity is amongst the very best software firewalls out there and it could easily protect your web applications against many threats and vulnerabilities, especially if you don’t update them or their plugins frequently.