ModSecurity is a highly effective web app layer firewall for Apache web servers. It monitors the whole HTTP traffic to a website without affecting its operation and if it identifies an intrusion attempt, it prevents it. The firewall additionally maintains a more detailed log for the site visitors than any server does, so you will manage to keep an eye on what is going on with your websites better than if you rely simply on standard logs. ModSecurity employs security rules based on which it prevents attacks. For instance, it detects whether someone is attempting to log in to the administrator area of a given script several times or if a request is sent to execute a file with a certain command. In these instances these attempts trigger the corresponding rules and the firewall program blocks the attempts right away, then records comprehensive info about them within its logs. ModSecurity is amongst the very best software firewalls on the market and it can protect your web applications against thousands of threats and vulnerabilities, especially in case you don’t update them or their plugins often.